Finding the Fourth Proportional to 56,810.72, 78,398.88 and 31,659.68

Step by Step Solution

1. Step 1: Write the proportion equation
   56,810.72 : 78,398.88 = 31,659.68 : x
2. Step 2: Convert to fraction form
   56,810.72/78,398.88 = 31,659.68/x
3. Step 3: Cross multiply
   56,810.72x = 78,398.88 × 31,659.68
4. Step 4: Simplify right side
   56,810.72x = 2,482,083,453.16
5. Step 5: Solve for x
   x = 2,482,083,453.16/56,810.72
6. Step 6: Final answer
   x = 43,690.41