Finding the Fourth Proportional to 56,561.55, 78,058.41 and 31,411.05

Step by Step Solution

1. Step 1: Write the proportion equation
   56,561.55 : 78,058.41 = 31,411.05 : x
2. Step 2: Convert to fraction form
   56,561.55/78,058.41 = 31,411.05/x
3. Step 3: Cross multiply
   56,561.55x = 78,058.41 × 31,411.05
4. Step 4: Simplify right side
   56,561.55x = 2,451,896,619.43
5. Step 5: Solve for x
   x = 2,451,896,619.43/56,561.55
6. Step 6: Final answer
   x = 43,349.18