Finding the Fourth Proportional to 1,353.72, 1,867.50 and 980.08

Step by Step Solution

1. Step 1: Write the proportion equation
   1,353.72 : 1,867.50 = 980.08 : x
2. Step 2: Convert to fraction form
   1,353.72/1,867.50 = 980.08/x
3. Step 3: Cross multiply
   1,353.72x = 1,867.50 × 980.08
4. Step 4: Simplify right side
   1,353.72x = 1,830,299.40
5. Step 5: Solve for x
   x = 1,830,299.40/1,353.72
6. Step 6: Final answer
   x = 1,352.05