Finding the Fourth Proportional to 105,156.28, 145,115.94 and 57,410.02

Step by Step Solution

1. Step 1: Write the proportion equation
   105,156.28 : 145,115.94 = 57,410.02 : x
2. Step 2: Convert to fraction form
   105,156.28/145,115.94 = 57,410.02/x
3. Step 3: Cross multiply
   105,156.28x = 145,115.94 × 57,410.02
4. Step 4: Simplify right side
   105,156.28x = 8,331,109,017.72
5. Step 5: Solve for x
   x = 8,331,109,017.72/105,156.28
6. Step 6: Final answer
   x = 79,225.98