Finding the Fourth Proportional to 78,429.24, 117,612.72 and 28,482.09

Step by Step Solution

1. Step 1: Write the proportion equation
   78,429.24 : 117,612.72 = 28,482.09 : x
2. Step 2: Convert to fraction form
   78,429.24/117,612.72 = 28,482.09/x
3. Step 3: Cross multiply
   78,429.24x = 117,612.72 × 28,482.09
4. Step 4: Simplify right side
   78,429.24x = 3,349,856,076.18
5. Step 5: Solve for x
   x = 3,349,856,076.18/78,429.24
6. Step 6: Final answer
   x = 42,711.83