Finding the Fourth Proportional to 56,731.35, 78,397.17 and 42,559.59

Step by Step Solution

1. Step 1: Write the proportion equation
   56,731.35 : 78,397.17 = 42,559.59 : x
2. Step 2: Convert to fraction form
   56,731.35/78,397.17 = 42,559.59/x
3. Step 3: Cross multiply
   56,731.35x = 78,397.17 × 42,559.59
4. Step 4: Simplify right side
   56,731.35x = 3,336,551,412.36
5. Step 5: Solve for x
   x = 3,336,551,412.36/56,731.35
6. Step 6: Final answer
   x = 58,813.19