Finding the Fourth Proportional to 105,356.83, 145,392.42 and 57,610.21

Step by Step Solution

1. Step 1: Write the proportion equation
   105,356.83 : 145,392.42 = 57,610.21 : x
2. Step 2: Convert to fraction form
   105,356.83/145,392.42 = 57,610.21/x
3. Step 3: Cross multiply
   105,356.83x = 145,392.42 × 57,610.21
4. Step 4: Simplify right side
   105,356.83x = 8,376,087,848.61
5. Step 5: Solve for x
   x = 8,376,087,848.61/105,356.83
6. Step 6: Final answer
   x = 79,502.09