Finding the Fourth Proportional to 56,569.40, 78,069.30 and 31,418.84

Step by Step Solution

1. Step 1: Write the proportion equation
   56,569.40 : 78,069.30 = 31,418.84 : x
2. Step 2: Convert to fraction form
   56,569.40/78,069.30 = 31,418.84/x
3. Step 3: Cross multiply
   56,569.40x = 78,069.30 × 31,418.84
4. Step 4: Simplify right side
   56,569.40x = 2,452,846,845.61
5. Step 5: Solve for x
   x = 2,452,846,845.61/56,569.40
6. Step 6: Final answer
   x = 43,359.96