Finding the Fourth Proportional to 78,388.79, 117,582.96 and 28,468.69

Step by Step Solution

1. Step 1: Write the proportion equation
   78,388.79 : 117,582.96 = 28,468.69 : x
2. Step 2: Convert to fraction form
   78,388.79/117,582.96 = 28,468.69/x
3. Step 3: Cross multiply
   78,388.79x = 117,582.96 × 28,468.69
4. Step 4: Simplify right side
   78,388.79x = 3,347,432,249.61
5. Step 5: Solve for x
   x = 3,347,432,249.61/78,388.79
6. Step 6: Final answer
   x = 42,702.95