Finding the Fourth Proportional to 64,572.77, 89,111.27 and 39,078.83

Step by Step Solution

1. Step 1: Write the proportion equation
   64,572.77 : 89,111.27 = 39,078.83 : x
2. Step 2: Convert to fraction form
   64,572.77/89,111.27 = 39,078.83/x
3. Step 3: Cross multiply
   64,572.77x = 89,111.27 × 39,078.83
4. Step 4: Simplify right side
   64,572.77x = 3,482,364,171.41
5. Step 5: Solve for x
   x = 3,482,364,171.41/64,572.77
6. Step 6: Final answer
   x = 53,929.30