Finding the Fourth Proportional to 57,175.86, 78,899.76 and 31,681.56

Step by Step Solution

1. Step 1: Write the proportion equation
   57,175.86 : 78,899.76 = 31,681.56 : x
2. Step 2: Convert to fraction form
   57,175.86/78,899.76 = 31,681.56/x
3. Step 3: Cross multiply
   57,175.86x = 78,899.76 × 31,681.56
4. Step 4: Simplify right side
   57,175.86x = 2,499,667,480.43
5. Step 5: Solve for x
   x = 2,499,667,480.43/57,175.86
6. Step 6: Final answer
   x = 43,718.93