Finding the Fourth Proportional to 80,917.52, 121,393.62 and 28,328.72

Step by Step Solution

1. Step 1: Write the proportion equation
   80,917.52 : 121,393.62 = 28,328.72 : x
2. Step 2: Convert to fraction form
   80,917.52/121,393.62 = 28,328.72/x
3. Step 3: Cross multiply
   80,917.52x = 121,393.62 × 28,328.72
4. Step 4: Simplify right side
   80,917.52x = 3,438,925,870.77
5. Step 5: Solve for x
   x = 3,438,925,870.77/80,917.52
6. Step 6: Final answer
   x = 42,499.15