Finding the Fourth Proportional to 80,904.32, 121,411.15 and 28,314.26

Step by Step Solution

1. Step 1: Write the proportion equation
   80,904.32 : 121,411.15 = 28,314.26 : x
2. Step 2: Convert to fraction form
   80,904.32/121,411.15 = 28,314.26/x
3. Step 3: Cross multiply
   80,904.32x = 121,411.15 × 28,314.26
4. Step 4: Simplify right side
   80,904.32x = 3,437,666,868.00
5. Step 5: Solve for x
   x = 3,437,666,868.00/80,904.32
6. Step 6: Final answer
   x = 42,490.52