Finding the Fourth Proportional to 56,587.20, 78,091.68 and 31,093.34

Step by Step Solution

1. Step 1: Write the proportion equation
   56,587.20 : 78,091.68 = 31,093.34 : x
2. Step 2: Convert to fraction form
   56,587.20/78,091.68 = 31,093.34/x
3. Step 3: Cross multiply
   56,587.20x = 78,091.68 × 31,093.34
4. Step 4: Simplify right side
   56,587.20x = 2,428,131,157.41
5. Step 5: Solve for x
   x = 2,428,131,157.41/56,587.20
6. Step 6: Final answer
   x = 42,909.55