Finding the Fourth Proportional to 88,885.47, 122,743.79 and 57,109.71

Step by Step Solution

1. Step 1: Write the proportion equation
   88,885.47 : 122,743.79 = 57,109.71 : x
2. Step 2: Convert to fraction form
   88,885.47/122,743.79 = 57,109.71/x
3. Step 3: Cross multiply
   88,885.47x = 122,743.79 × 57,109.71
4. Step 4: Simplify right side
   88,885.47x = 7,009,862,251.20
5. Step 5: Solve for x
   x = 7,009,862,251.20/88,885.47
6. Step 6: Final answer
   x = 78,863.98