Finding the Fourth Proportional to 64,499,197.05, 90,553,967.55 and 64,499,197.05

Step by Step Solution

1. Step 1: Write the proportion equation
   64,499,197.05 : 90,553,967.55 = 64,499,197.05 : x
2. Step 2: Convert to fraction form
   64,499,197.05/90,553,967.55 = 64,499,197.05/x
3. Step 3: Cross multiply
   64,499,197.05x = 90,553,967.55 × 64,499,197.05
4. Step 4: Simplify right side
   64,499,197.05x = 5,840,658,196,666,755
5. Step 5: Solve for x
   x = 5,840,658,196,666,755/64,499,197.05
6. Step 6: Final answer
   x = 90,553,967.55