Finding the Fourth Proportional to 105,505,053.28, 145,596,960.48 and 64,251,934.72

Step by Step Solution

1. Step 1: Write the proportion equation
   105,505,053.28 : 145,596,960.48 = 64,251,934.72 : x
2. Step 2: Convert to fraction form
   105,505,053.28/145,596,960.48 = 64,251,934.72/x
3. Step 3: Cross multiply
   105,505,053.28x = 145,596,960.48 × 64,251,934.72
4. Step 4: Simplify right side
   105,505,053.28x = 9,354,886,400,191,380
5. Step 5: Solve for x
   x = 9,354,886,400,191,380/105,505,053.28
6. Step 6: Final answer
   x = 88,667,661.97