Finding the Fourth Proportional to 1,337.47, 1,843.82 and 839.77

Step by Step Solution

1. Step 1: Write the proportion equation
   1,337.47 : 1,843.82 = 839.77 : x
2. Step 2: Convert to fraction form
   1,337.47/1,843.82 = 839.77/x
3. Step 3: Cross multiply
   1,337.47x = 1,843.82 × 839.77
4. Step 4: Simplify right side
   1,337.47x = 1,548,384.72
5. Step 5: Solve for x
   x = 1,548,384.72/1,337.47
6. Step 6: Final answer
   x = 1,157.70