Finding the Fourth Proportional to 278,300.16, 417,483.06 and 88,694.55

Step by Step Solution

1. Step 1: Write the proportion equation
   278,300.16 : 417,483.06 = 88,694.55 : x
2. Step 2: Convert to fraction form
   278,300.16/417,483.06 = 88,694.55/x
3. Step 3: Cross multiply
   278,300.16x = 417,483.06 × 88,694.55
4. Step 4: Simplify right side
   278,300.16x = 37,028,472,139.32
5. Step 5: Solve for x
   x = 37,028,472,139.32/278,300.16
6. Step 6: Final answer
   x = 133,052.28