Finding the Third Proportional to 64,715,856 and 91,027,420

Step by Step Solution

1. Step 1: Write the proportion equation
   64,715,856 : 91,027,420 = 91,027,420 : x
2. Step 2: Convert to fraction form
   64,715,856/91,027,420 = 91,027,420/x
3. Step 3: Cross multiply
   64,715,856x = 91,027,420 × 91,027,420
4. Step 4: Simplify right side
   64,715,856x = 8,285,991,191,856,400
5. Step 5: Solve for x
   x = 8,285,991,191,856,400/64,715,856
6. Step 6: Final answer
   x = 128,036,492.20