Finding the Fourth Proportional to 79,037.72, 109,071.80 and 42,738.90

Step by Step Solution

1. Step 1: Write the proportion equation
   79,037.72 : 109,071.80 = 42,738.90 : x
2. Step 2: Convert to fraction form
   79,037.72/109,071.80 = 42,738.90/x
3. Step 3: Cross multiply
   79,037.72x = 109,071.80 × 42,738.90
4. Step 4: Simplify right side
   79,037.72x = 4,661,608,753.02
5. Step 5: Solve for x
   x = 4,661,608,753.02/79,037.72
6. Step 6: Final answer
   x = 58,979.54