Finding the Fourth Proportional to 78,990.72, 118,383.92 and 59,113.28

Step by Step Solution

1. Step 1: Write the proportion equation
   78,990.72 : 118,383.92 = 59,113.28 : x
2. Step 2: Convert to fraction form
   78,990.72/118,383.92 = 59,113.28/x
3. Step 3: Cross multiply
   78,990.72x = 118,383.92 × 59,113.28
4. Step 4: Simplify right side
   78,990.72x = 6,998,061,810.46
5. Step 5: Solve for x
   x = 6,998,061,810.46/78,990.72
6. Step 6: Final answer
   x = 88,593.47