Finding the Fourth Proportional to 56,838.89, 78,437.82 and 31,344.62

Step by Step Solution

1. Step 1: Write the proportion equation
   56,838.89 : 78,437.82 = 31,344.62 : x
2. Step 2: Convert to fraction form
   56,838.89/78,437.82 = 31,344.62/x
3. Step 3: Cross multiply
   56,838.89x = 78,437.82 × 31,344.62
4. Step 4: Simplify right side
   56,838.89x = 2,458,603,651.78
5. Step 5: Solve for x
   x = 2,458,603,651.78/56,838.89
6. Step 6: Final answer
   x = 43,255.66