Finding the Fourth Proportional to 1,672.59, 2,307.61 and 1,340.90

Step by Step Solution

1. Step 1: Write the proportion equation
   1,672.59 : 2,307.61 = 1,340.90 : x
2. Step 2: Convert to fraction form
   1,672.59/2,307.61 = 1,340.90/x
3. Step 3: Cross multiply
   1,672.59x = 2,307.61 × 1,340.90
4. Step 4: Simplify right side
   1,672.59x = 3,094,274.25
5. Step 5: Solve for x
   x = 3,094,274.25/1,672.59
6. Step 6: Final answer
   x = 1,849.99