Finding the Fourth Proportional to 1,019.88, 1,529.34 and 435.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,019.88 : 1,529.34 = 435.15 : x
2. Step 2: Convert to fraction form
   1,019.88/1,529.34 = 435.15/x
3. Step 3: Cross multiply
   1,019.88x = 1,529.34 × 435.15
4. Step 4: Simplify right side
   1,019.88x = 665,492.30
5. Step 5: Solve for x
   x = 665,492.30/1,019.88
6. Step 6: Final answer
   x = 652.52