Finding the Fourth Proportional to 278,498.63, 417,618.34 and 100,998.47

Step by Step Solution

1. Step 1: Write the proportion equation
   278,498.63 : 417,618.34 = 100,998.47 : x
2. Step 2: Convert to fraction form
   278,498.63/417,618.34 = 100,998.47/x
3. Step 3: Cross multiply
   278,498.63x = 417,618.34 × 100,998.47
4. Step 4: Simplify right side
   278,498.63x = 42,178,813,383.94
5. Step 5: Solve for x
   x = 42,178,813,383.94/278,498.63
6. Step 6: Final answer
   x = 151,450.70