Finding the Fourth Proportional to 79,036.90, 109,070.66 and 42,738.10

Step by Step Solution

1. Step 1: Write the proportion equation
   79,036.90 : 109,070.66 = 42,738.10 : x
2. Step 2: Convert to fraction form
   79,036.90/109,070.66 = 42,738.10/x
3. Step 3: Cross multiply
   79,036.90x = 109,070.66 × 42,738.10
4. Step 4: Simplify right side
   79,036.90x = 4,661,472,608.31
5. Step 5: Solve for x
   x = 4,661,472,608.31/79,036.90
6. Step 6: Final answer
   x = 58,978.44