Finding the Fourth Proportional to 80,870.95, 121,317.76 and 28,268.47

Step by Step Solution

1. Step 1: Write the proportion equation
   80,870.95 : 121,317.76 = 28,268.47 : x
2. Step 2: Convert to fraction form
   80,870.95/121,317.76 = 28,268.47/x
3. Step 3: Cross multiply
   80,870.95x = 121,317.76 × 28,268.47
4. Step 4: Simplify right side
   80,870.95x = 3,429,466,781.77
5. Step 5: Solve for x
   x = 3,429,466,781.77/80,870.95
6. Step 6: Final answer
   x = 42,406.66