Finding the Fourth Proportional to 1,401.17, 2,100.24 and 579.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,401.17 : 2,100.24 = 579.02 : x
2. Step 2: Convert to fraction form
   1,401.17/2,100.24 = 579.02/x
3. Step 3: Cross multiply
   1,401.17x = 2,100.24 × 579.02
4. Step 4: Simplify right side
   1,401.17x = 1,216,086.22
5. Step 5: Solve for x
   x = 1,216,086.22/1,401.17
6. Step 6: Final answer
   x = 867.91