Finding the Fourth Proportional to 88,016.52, 121,430.90 and 57,818.10

Step by Step Solution

1. Step 1: Write the proportion equation
   88,016.52 : 121,430.90 = 57,818.10 : x
2. Step 2: Convert to fraction form
   88,016.52/121,430.90 = 57,818.10/x
3. Step 3: Cross multiply
   88,016.52x = 121,430.90 × 57,818.10
4. Step 4: Simplify right side
   88,016.52x = 7,020,903,919.29
5. Step 5: Solve for x
   x = 7,020,903,919.29/88,016.52
6. Step 6: Final answer
   x = 79,768.02