Finding the Fourth Proportional to 105,100.56, 145,038.24 and 57,356.64

Step by Step Solution

1. Step 1: Write the proportion equation
   105,100.56 : 145,038.24 = 57,356.64 : x
2. Step 2: Convert to fraction form
   105,100.56/145,038.24 = 57,356.64/x
3. Step 3: Cross multiply
   105,100.56x = 145,038.24 × 57,356.64
4. Step 4: Simplify right side
   105,100.56x = 8,318,906,117.91
5. Step 5: Solve for x
   x = 8,318,906,117.91/105,100.56
6. Step 6: Final answer
   x = 79,151.87