Finding the Fourth Proportional to 56,581.09, 78,082.43 and 31,087.98

Step by Step Solution

1. Step 1: Write the proportion equation
   56,581.09 : 78,082.43 = 31,087.98 : x
2. Step 2: Convert to fraction form
   56,581.09/78,082.43 = 31,087.98/x
3. Step 3: Cross multiply
   56,581.09x = 78,082.43 × 31,087.98
4. Step 4: Simplify right side
   56,581.09x = 2,427,424,866.75
5. Step 5: Solve for x
   x = 2,427,424,866.75/56,581.09
6. Step 6: Final answer
   x = 42,901.70