Finding the Fourth Proportional to 57,156.97, 78,876.59 and 31,664.98

Step by Step Solution

1. Step 1: Write the proportion equation
   57,156.97 : 78,876.59 = 31,664.98 : x
2. Step 2: Convert to fraction form
   57,156.97/78,876.59 = 31,664.98/x
3. Step 3: Cross multiply
   57,156.97x = 78,876.59 × 31,664.98
4. Step 4: Simplify right side
   57,156.97x = 2,497,626,074.10
5. Step 5: Solve for x
   x = 2,497,626,074.10/57,156.97
6. Step 6: Final answer
   x = 43,697.67