Finding the Third Proportional to 64,706,977.50 and 91,015,294.50

Step by Step Solution

1. Step 1: Write the proportion equation
   64,706,977.50 : 91,015,294.50 = 91,015,294.50 : x
2. Step 2: Convert to fraction form
   64,706,977.50/91,015,294.50 = 91,015,294.50/x
3. Step 3: Cross multiply
   64,706,977.50x = 91,015,294.50 × 91,015,294.50
4. Step 4: Simplify right side
   64,706,977.50x = 8,283,783,832,921,730
5. Step 5: Solve for x
   x = 8,283,783,832,921,730/64,706,977.50
6. Step 6: Final answer
   x = 128,019,947.04