Finding the Fourth Proportional to 57,153.18, 78,870.67 and 31,659.45

Step by Step Solution

1. Step 1: Write the proportion equation
   57,153.18 : 78,870.67 = 31,659.45 : x
2. Step 2: Convert to fraction form
   57,153.18/78,870.67 = 31,659.45/x
3. Step 3: Cross multiply
   57,153.18x = 78,870.67 × 31,659.45
4. Step 4: Simplify right side
   57,153.18x = 2,497,002,033.33
5. Step 5: Solve for x
   x = 2,497,002,033.33/57,153.18
6. Step 6: Final answer
   x = 43,689.64