Finding the Fourth Proportional to 105,174.96, 145,294.98 and 91,003.20

Step by Step Solution

1. Step 1: Write the proportion equation
   105,174.96 : 145,294.98 = 91,003.20 : x
2. Step 2: Convert to fraction form
   105,174.96/145,294.98 = 91,003.20/x
3. Step 3: Cross multiply
   105,174.96x = 145,294.98 × 91,003.20
4. Step 4: Simplify right side
   105,174.96x = 13,222,308,123.94
5. Step 5: Solve for x
   x = 13,222,308,123.94/105,174.96
6. Step 6: Final answer
   x = 125,717.26