Finding the Fourth Proportional to 2,586.90, 3,569.88 and 1,407.99

Step by Step Solution

1. Step 1: Write the proportion equation
   2,586.90 : 3,569.88 = 1,407.99 : x
2. Step 2: Convert to fraction form
   2,586.90/3,569.88 = 1,407.99/x
3. Step 3: Cross multiply
   2,586.90x = 3,569.88 × 1,407.99
4. Step 4: Simplify right side
   2,586.90x = 5,026,355.34
5. Step 5: Solve for x
   x = 5,026,355.34/2,586.90
6. Step 6: Final answer
   x = 1,943.00