Finding the Fourth Proportional to 80,886.69, 121,384.71 and 28,296.63

Step by Step Solution

1. Step 1: Write the proportion equation
   80,886.69 : 121,384.71 = 28,296.63 : x
2. Step 2: Convert to fraction form
   80,886.69/121,384.71 = 28,296.63/x
3. Step 3: Cross multiply
   80,886.69x = 121,384.71 × 28,296.63
4. Step 4: Simplify right side
   80,886.69x = 3,434,778,226.53
5. Step 5: Solve for x
   x = 3,434,778,226.53/80,886.69
6. Step 6: Final answer
   x = 42,464.07