Finding the Fourth Proportional to 2,156.02, 3,233.12 and 840.17

Step by Step Solution

1. Step 1: Write the proportion equation
   2,156.02 : 3,233.12 = 840.17 : x
2. Step 2: Convert to fraction form
   2,156.02/3,233.12 = 840.17/x
3. Step 3: Cross multiply
   2,156.02x = 3,233.12 × 840.17
4. Step 4: Simplify right side
   2,156.02x = 2,716,374.31
5. Step 5: Solve for x
   x = 2,716,374.31/2,156.02
6. Step 6: Final answer
   x = 1,259.90