Finding the Fourth Proportional to 278,155.98, 417,124.77 and 98,203

Step by Step Solution

1. Step 1: Write the proportion equation
   278,155.98 : 417,124.77 = 98,203 : x
2. Step 2: Convert to fraction form
   278,155.98/417,124.77 = 98,203/x
3. Step 3: Cross multiply
   278,155.98x = 417,124.77 × 98,203
4. Step 4: Simplify right side
   278,155.98x = 40,962,903,788.31
5. Step 5: Solve for x
   x = 40,962,903,788.31/278,155.98
6. Step 6: Final answer
   x = 147,265.95