Finding the Fourth Proportional to 1,061.08, 1,595.28 and 980.90

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061.08 : 1,595.28 = 980.90 : x
2. Step 2: Convert to fraction form
   1,061.08/1,595.28 = 980.90/x
3. Step 3: Cross multiply
   1,061.08x = 1,595.28 × 980.90
4. Step 4: Simplify right side
   1,061.08x = 1,564,810.15
5. Step 5: Solve for x
   x = 1,564,810.15/1,061.08
6. Step 6: Final answer
   x = 1,474.73