Finding the Fourth Proportional to 56,641.89, 78,167.81 and 31,150.19

Step by Step Solution

1. Step 1: Write the proportion equation
   56,641.89 : 78,167.81 = 31,150.19 : x
2. Step 2: Convert to fraction form
   56,641.89/78,167.81 = 31,150.19/x
3. Step 3: Cross multiply
   56,641.89x = 78,167.81 × 31,150.19
4. Step 4: Simplify right side
   56,641.89x = 2,434,942,406.68
5. Step 5: Solve for x
   x = 2,434,942,406.68/56,641.89
6. Step 6: Final answer
   x = 42,988.37