Finding the Fourth Proportional to 1,679.17, 2,516.31 and 1,061.35

Step by Step Solution

1. Step 1: Write the proportion equation
   1,679.17 : 2,516.31 = 1,061.35 : x
2. Step 2: Convert to fraction form
   1,679.17/2,516.31 = 1,061.35/x
3. Step 3: Cross multiply
   1,679.17x = 2,516.31 × 1,061.35
4. Step 4: Simplify right side
   1,679.17x = 2,670,685.62
5. Step 5: Solve for x
   x = 2,670,685.62/1,679.17
6. Step 6: Final answer
   x = 1,590.48