Finding the Third Proportional to 2,199,399.75 and 4,599,787.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,199,399.75 : 4,599,787.50 = 4,599,787.50 : x
2. Step 2: Convert to fraction form
   2,199,399.75/4,599,787.50 = 4,599,787.50/x
3. Step 3: Cross multiply
   2,199,399.75x = 4,599,787.50 × 4,599,787.50
4. Step 4: Simplify right side
   2,199,399.75x = 21,158,045,045,156.25
5. Step 5: Solve for x
   x = 21,158,045,045,156.25/2,199,399.75
6. Step 6: Final answer
   x = 9,619,917.91