Finding the Fourth Proportional to 78,298.30, 117,447.12 and 28,366.69

Step by Step Solution

1. Step 1: Write the proportion equation
   78,298.30 : 117,447.12 = 28,366.69 : x
2. Step 2: Convert to fraction form
   78,298.30/117,447.12 = 28,366.69/x
3. Step 3: Cross multiply
   78,298.30x = 117,447.12 × 28,366.69
4. Step 4: Simplify right side
   78,298.30x = 3,331,586,044.43
5. Step 5: Solve for x
   x = 3,331,586,044.43/78,298.30
6. Step 6: Final answer
   x = 42,549.92