Finding the Fourth Proportional to 998,061.82, 1,497,104.61 and 278,359.74

Step by Step Solution

1. Step 1: Write the proportion equation
   998,061.82 : 1,497,104.61 = 278,359.74 : x
2. Step 2: Convert to fraction form
   998,061.82/1,497,104.61 = 278,359.74/x
3. Step 3: Cross multiply
   998,061.82x = 1,497,104.61 × 278,359.74
4. Step 4: Simplify right side
   998,061.82x = 416,733,649,992.40
5. Step 5: Solve for x
   x = 416,733,649,992.40/998,061.82
6. Step 6: Final answer
   x = 417,542.92