Finding the Fourth Proportional to 109,520.10, 164,158.65 and 42,938.10

Step by Step Solution

1. Step 1: Write the proportion equation
   109,520.10 : 164,158.65 = 42,938.10 : x
2. Step 2: Convert to fraction form
   109,520.10/164,158.65 = 42,938.10/x
3. Step 3: Cross multiply
   109,520.10x = 164,158.65 × 42,938.10
4. Step 4: Simplify right side
   109,520.10x = 7,048,660,529.57
5. Step 5: Solve for x
   x = 7,048,660,529.57/109,520.10
6. Step 6: Final answer
   x = 64,359.52