Finding the Fourth Proportional to 102,821.83, 141,893.15 and 57,499.29

Step by Step Solution

1. Step 1: Write the proportion equation
   102,821.83 : 141,893.15 = 57,499.29 : x
2. Step 2: Convert to fraction form
   102,821.83/141,893.15 = 57,499.29/x
3. Step 3: Cross multiply
   102,821.83x = 141,893.15 × 57,499.29
4. Step 4: Simplify right side
   102,821.83x = 8,158,755,093.37
5. Step 5: Solve for x
   x = 8,158,755,093.37/102,821.83
6. Step 6: Final answer
   x = 79,348.47