Finding the Fourth Proportional to 1,539.43, 2,124.42 and 840.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,539.43 : 2,124.42 = 840.82 : x
2. Step 2: Convert to fraction form
   1,539.43/2,124.42 = 840.82/x
3. Step 3: Cross multiply
   1,539.43x = 2,124.42 × 840.82
4. Step 4: Simplify right side
   1,539.43x = 1,786,254.82
5. Step 5: Solve for x
   x = 1,786,254.82/1,539.43
6. Step 6: Final answer
   x = 1,160.34