Finding the Fourth Proportional to 1,347.55, 2,019.15 and 1,131.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,347.55 : 2,019.15 = 1,131.55 : x
2. Step 2: Convert to fraction form
   1,347.55/2,019.15 = 1,131.55/x
3. Step 3: Cross multiply
   1,347.55x = 2,019.15 × 1,131.55
4. Step 4: Simplify right side
   1,347.55x = 2,284,769.18
5. Step 5: Solve for x
   x = 2,284,769.18/1,347.55
6. Step 6: Final answer
   x = 1,695.50