Finding the Fourth Proportional to 64,490.67, 89,002.71 and 35,815.86

Step by Step Solution

1. Step 1: Write the proportion equation
   64,490.67 : 89,002.71 = 35,815.86 : x
2. Step 2: Convert to fraction form
   64,490.67/89,002.71 = 35,815.86/x
3. Step 3: Cross multiply
   64,490.67x = 89,002.71 × 35,815.86
4. Step 4: Simplify right side
   64,490.67x = 3,187,708,600.98
5. Step 5: Solve for x
   x = 3,187,708,600.98/64,490.67
6. Step 6: Final answer
   x = 49,428.99