Finding the Fourth Proportional to 64,210.30, 88,651.80 and 57,484.32

Step by Step Solution

1. Step 1: Write the proportion equation
   64,210.30 : 88,651.80 = 57,484.32 : x
2. Step 2: Convert to fraction form
   64,210.30/88,651.80 = 57,484.32/x
3. Step 3: Cross multiply
   64,210.30x = 88,651.80 × 57,484.32
4. Step 4: Simplify right side
   64,210.30x = 5,096,088,439.78
5. Step 5: Solve for x
   x = 5,096,088,439.78/64,210.30
6. Step 6: Final answer
   x = 79,365.59