Finding the Fourth Proportional to 56,860.52, 78,499.68 and 39,429.32

Step by Step Solution

1. Step 1: Write the proportion equation
   56,860.52 : 78,499.68 = 39,429.32 : x
2. Step 2: Convert to fraction form
   56,860.52/78,499.68 = 39,429.32/x
3. Step 3: Cross multiply
   56,860.52x = 78,499.68 × 39,429.32
4. Step 4: Simplify right side
   56,860.52x = 3,095,189,002.62
5. Step 5: Solve for x
   x = 3,095,189,002.62/56,860.52
6. Step 6: Final answer
   x = 54,434.76