Finding the Fourth Proportional to 56,891.37, 78,505.43 and 31,740.33

Step by Step Solution

1. Step 1: Write the proportion equation
   56,891.37 : 78,505.43 = 31,740.33 : x
2. Step 2: Convert to fraction form
   56,891.37/78,505.43 = 31,740.33/x
3. Step 3: Cross multiply
   56,891.37x = 78,505.43 × 31,740.33
4. Step 4: Simplify right side
   56,891.37x = 2,491,788,096.29
5. Step 5: Solve for x
   x = 2,491,788,096.29/56,891.37
6. Step 6: Final answer
   x = 43,799.05