Finding the Third Proportional to 139,405,182.50 and 210,903,649.50

Step by Step Solution

1. Step 1: Write the proportion equation
   139,405,182.50 : 210,903,649.50 = 210,903,649.50 : x
2. Step 2: Convert to fraction form
   139,405,182.50/210,903,649.50 = 210,903,649.50/x
3. Step 3: Cross multiply
   139,405,182.50x = 210,903,649.50 × 210,903,649.50
4. Step 4: Simplify right side
   139,405,182.50x = 44,480,349,372,418,848
5. Step 5: Solve for x
   x = 44,480,349,372,418,848/139,405,182.50
6. Step 6: Final answer
   x = 319,072,423.10