Finding the Fourth Proportional to 1,061.10, 1,589.55 and 981.35

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061.10 : 1,589.55 = 981.35 : x
2. Step 2: Convert to fraction form
   1,061.10/1,589.55 = 981.35/x
3. Step 3: Cross multiply
   1,061.10x = 1,589.55 × 981.35
4. Step 4: Simplify right side
   1,061.10x = 1,559,904.89
5. Step 5: Solve for x
   x = 1,559,904.89/1,061.10
6. Step 6: Final answer
   x = 1,470.08