Finding the Fourth Proportional to 57,007.50, 78,670.35 and 31,857

Step by Step Solution

1. Step 1: Write the proportion equation
   57,007.50 : 78,670.35 = 31,857 : x
2. Step 2: Convert to fraction form
   57,007.50/78,670.35 = 31,857/x
3. Step 3: Cross multiply
   57,007.50x = 78,670.35 × 31,857
4. Step 4: Simplify right side
   57,007.50x = 2,506,201,339.95
5. Step 5: Solve for x
   x = 2,506,201,339.95/57,007.50
6. Step 6: Final answer
   x = 43,962.66