Finding the Fourth Proportional to 64,499,212.18, 90,553,988.73 and 64,499,212.18

Step by Step Solution

1. Step 1: Write the proportion equation
   64,499,212.18 : 90,553,988.73 = 64,499,212.18 : x
2. Step 2: Convert to fraction form
   64,499,212.18/90,553,988.73 = 64,499,212.18/x
3. Step 3: Cross multiply
   64,499,212.18x = 90,553,988.73 × 64,499,212.18
4. Step 4: Simplify right side
   64,499,212.18x = 5,840,660,932,066,332
5. Step 5: Solve for x
   x = 5,840,660,932,066,332/64,499,212.18
6. Step 6: Final answer
   x = 90,553,988.73