Finding the Fourth Proportional to 78,108.64, 117,138.72 and 28,182.25

Step by Step Solution

1. Step 1: Write the proportion equation
   78,108.64 : 117,138.72 = 28,182.25 : x
2. Step 2: Convert to fraction form
   78,108.64/117,138.72 = 28,182.25/x
3. Step 3: Cross multiply
   78,108.64x = 117,138.72 × 28,182.25
4. Step 4: Simplify right side
   78,108.64x = 3,301,232,691.72
5. Step 5: Solve for x
   x = 3,301,232,691.72/78,108.64
6. Step 6: Final answer
   x = 42,264.63