Finding the Fourth Proportional to 1,679.20, 2,315.35 and 1,363.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,679.20 : 2,315.35 = 1,363.50 : x
2. Step 2: Convert to fraction form
   1,679.20/2,315.35 = 1,363.50/x
3. Step 3: Cross multiply
   1,679.20x = 2,315.35 × 1,363.50
4. Step 4: Simplify right side
   1,679.20x = 3,156,981.43
5. Step 5: Solve for x
   x = 3,156,981.43/1,679.20
6. Step 6: Final answer
   x = 1,880.05