Finding the Fourth Proportional to 2,117.90, 2,916.18 and 1,881.43

Step by Step Solution

1. Step 1: Write the proportion equation
   2,117.90 : 2,916.18 = 1,881.43 : x
2. Step 2: Convert to fraction form
   2,117.90/2,916.18 = 1,881.43/x
3. Step 3: Cross multiply
   2,117.90x = 2,916.18 × 1,881.43
4. Step 4: Simplify right side
   2,117.90x = 5,486,592.42
5. Step 5: Solve for x
   x = 5,486,592.42/2,117.90
6. Step 6: Final answer
   x = 2,590.58