Finding the Fourth Proportional to 56,885.05, 78,500.73 and 31,391.61

Step by Step Solution

1. Step 1: Write the proportion equation
   56,885.05 : 78,500.73 = 31,391.61 : x
2. Step 2: Convert to fraction form
   56,885.05/78,500.73 = 31,391.61/x
3. Step 3: Cross multiply
   56,885.05x = 78,500.73 × 31,391.61
4. Step 4: Simplify right side
   56,885.05x = 2,464,264,300.88
5. Step 5: Solve for x
   x = 2,464,264,300.88/56,885.05
6. Step 6: Final answer
   x = 43,320.07