Finding the Fourth Proportional to 80,205.39, 120,526.18 and 42,791.90

Step by Step Solution

1. Step 1: Write the proportion equation
   80,205.39 : 120,526.18 = 42,791.90 : x
2. Step 2: Convert to fraction form
   80,205.39/120,526.18 = 42,791.90/x
3. Step 3: Cross multiply
   80,205.39x = 120,526.18 × 42,791.90
4. Step 4: Simplify right side
   80,205.39x = 5,157,543,532.33
5. Step 5: Solve for x
   x = 5,157,543,532.33/80,205.39
6. Step 6: Final answer
   x = 64,304.20