Finding the Fourth Proportional to 1,069.01, 1,602.74 and 721.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,069.01 : 1,602.74 = 721.47 : x
2. Step 2: Convert to fraction form
   1,069.01/1,602.74 = 721.47/x
3. Step 3: Cross multiply
   1,069.01x = 1,602.74 × 721.47
4. Step 4: Simplify right side
   1,069.01x = 1,156,328.83
5. Step 5: Solve for x
   x = 1,156,328.83/1,069.01
6. Step 6: Final answer
   x = 1,081.68