Finding the Fourth Proportional to 102,699.51, 141,722.71 and 57,377.83

Step by Step Solution

1. Step 1: Write the proportion equation
   102,699.51 : 141,722.71 = 57,377.83 : x
2. Step 2: Convert to fraction form
   102,699.51/141,722.71 = 57,377.83/x
3. Step 3: Cross multiply
   102,699.51x = 141,722.71 × 57,377.83
4. Step 4: Simplify right side
   102,699.51x = 8,131,741,561.52
5. Step 5: Solve for x
   x = 8,131,741,561.52/102,699.51
6. Step 6: Final answer
   x = 79,179.95