Finding the Fourth Proportional to 105,238.04, 145,174.56 and 71,247.74

Step by Step Solution

1. Step 1: Write the proportion equation
   105,238.04 : 145,174.56 = 71,247.74 : x
2. Step 2: Convert to fraction form
   105,238.04/145,174.56 = 71,247.74/x
3. Step 3: Cross multiply
   105,238.04x = 145,174.56 × 71,247.74
4. Step 4: Simplify right side
   105,238.04x = 10,343,359,305.49
5. Step 5: Solve for x
   x = 10,343,359,305.49/105,238.04
6. Step 6: Final answer
   x = 98,285.37