Finding the Fourth Proportional to 275,978.76, 413,718.69 and 98,443.57

Step by Step Solution

1. Step 1: Write the proportion equation
   275,978.76 : 413,718.69 = 98,443.57 : x
2. Step 2: Convert to fraction form
   275,978.76/413,718.69 = 98,443.57/x
3. Step 3: Cross multiply
   275,978.76x = 413,718.69 × 98,443.57
4. Step 4: Simplify right side
   275,978.76x = 40,727,944,376.17
5. Step 5: Solve for x
   x = 40,727,944,376.17/275,978.76
6. Step 6: Final answer
   x = 147,576.37