Finding the Fourth Proportional to 102,170.72, 140,994.24 and 57,458.72

Step by Step Solution

1. Step 1: Write the proportion equation
   102,170.72 : 140,994.24 = 57,458.72 : x
2. Step 2: Convert to fraction form
   102,170.72/140,994.24 = 57,458.72/x
3. Step 3: Cross multiply
   102,170.72x = 140,994.24 × 57,458.72
4. Step 4: Simplify right side
   102,170.72x = 8,101,348,557.77
5. Step 5: Solve for x
   x = 8,101,348,557.77/102,170.72
6. Step 6: Final answer
   x = 79,292.27