Finding the Fourth Proportional to 105,155.55, 145,115.15 and 57,410.00

Step by Step Solution

1. Step 1: Write the proportion equation
   105,155.55 : 145,115.15 = 57,410.00 : x
2. Step 2: Convert to fraction form
   105,155.55/145,115.15 = 57,410.00/x
3. Step 3: Cross multiply
   105,155.55x = 145,115.15 × 57,410.00
4. Step 4: Simplify right side
   105,155.55x = 8,331,060,293.06
5. Step 5: Solve for x
   x = 8,331,060,293.06/105,155.55
6. Step 6: Final answer
   x = 79,226.06