Finding the Fourth Proportional to 88,109,836.39, 121,437,662.56 and 64,538,294.91

Step by Step Solution

1. Step 1: Write the proportion equation
   88,109,836.39 : 121,437,662.56 = 64,538,294.91 : x
2. Step 2: Convert to fraction form
   88,109,836.39/121,437,662.56 = 64,538,294.91/x
3. Step 3: Cross multiply
   88,109,836.39x = 121,437,662.56 × 64,538,294.91
4. Step 4: Simplify right side
   88,109,836.39x = 7,837,379,679,478,345
5. Step 5: Solve for x
   x = 7,837,379,679,478,345/88,109,836.39
6. Step 6: Final answer
   x = 88,950,110.46