Finding the Fourth Proportional to 56,407.56, 77,842.50 and 31,257

Step by Step Solution

1. Step 1: Write the proportion equation
   56,407.56 : 77,842.50 = 31,257 : x
2. Step 2: Convert to fraction form
   56,407.56/77,842.50 = 31,257/x
3. Step 3: Cross multiply
   56,407.56x = 77,842.50 × 31,257
4. Step 4: Simplify right side
   56,407.56x = 2,433,123,022.50
5. Step 5: Solve for x
   x = 2,433,123,022.50/56,407.56
6. Step 6: Final answer
   x = 43,134.70