Finding the Third Proportional to 12,532,315,507 and 18,959,919,787.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,532,315,507 : 18,959,919,787.50 = 18,959,919,787.50 : x
2. Step 2: Convert to fraction form
   12,532,315,507/18,959,919,787.50 = 18,959,919,787.50/x
3. Step 3: Cross multiply
   12,532,315,507x = 18,959,919,787.50 × 18,959,919,787.50
4. Step 4: Simplify right side
   12,532,315,507x = 359,478,558,348,434,014,208
5. Step 5: Solve for x
   x = 359,478,558,348,434,014,208/12,532,315,507
6. Step 6: Final answer
   x = 28,684,129,293.40