Finding the Fourth Proportional to 187,493.30, 258,740.56 and 105,838.72

Step by Step Solution

1. Step 1: Write the proportion equation
   187,493.30 : 258,740.56 = 105,838.72 : x
2. Step 2: Convert to fraction form
   187,493.30/258,740.56 = 105,838.72/x
3. Step 3: Cross multiply
   187,493.30x = 258,740.56 × 105,838.72
4. Step 4: Simplify right side
   187,493.30x = 27,384,769,167.93
5. Step 5: Solve for x
   x = 27,384,769,167.93/187,493.30
6. Step 6: Final answer
   x = 146,057.32