Finding the Fourth Proportional to 1,019.83, 1,528.99 and 653.91

Step by Step Solution

1. Step 1: Write the proportion equation
   1,019.83 : 1,528.99 = 653.91 : x
2. Step 2: Convert to fraction form
   1,019.83/1,528.99 = 653.91/x
3. Step 3: Cross multiply
   1,019.83x = 1,528.99 × 653.91
4. Step 4: Simplify right side
   1,019.83x = 999,821.85
5. Step 5: Solve for x
   x = 999,821.85/1,019.83
6. Step 6: Final answer
   x = 980.38