Finding the Fourth Proportional to 56,843.90, 78,438.54 and 31,348.57

Step by Step Solution

1. Step 1: Write the proportion equation
   56,843.90 : 78,438.54 = 31,348.57 : x
2. Step 2: Convert to fraction form
   56,843.90/78,438.54 = 31,348.57/x
3. Step 3: Cross multiply
   56,843.90x = 78,438.54 × 31,348.57
4. Step 4: Simplify right side
   56,843.90x = 2,458,936,061.89
5. Step 5: Solve for x
   x = 2,458,936,061.89/56,843.90
6. Step 6: Final answer
   x = 43,257.69