Finding the Fourth Proportional to 56,916.78, 78,541.89 and 31,422.53

Step by Step Solution

1. Step 1: Write the proportion equation
   56,916.78 : 78,541.89 = 31,422.53 : x
2. Step 2: Convert to fraction form
   56,916.78/78,541.89 = 31,422.53/x
3. Step 3: Cross multiply
   56,916.78x = 78,541.89 × 31,422.53
4. Step 4: Simplify right side
   56,916.78x = 2,467,984,973.30
5. Step 5: Solve for x
   x = 2,467,984,973.30/56,916.78
6. Step 6: Final answer
   x = 43,361.29