Finding the Fourth Proportional to 1,401.17, 1,934.51 and 870.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,401.17 : 1,934.51 = 870.61 : x
2. Step 2: Convert to fraction form
   1,401.17/1,934.51 = 870.61/x
3. Step 3: Cross multiply
   1,401.17x = 1,934.51 × 870.61
4. Step 4: Simplify right side
   1,401.17x = 1,684,203.75
5. Step 5: Solve for x
   x = 1,684,203.75/1,401.17
6. Step 6: Final answer
   x = 1,202.00