Finding the Fourth Proportional to 1,986.68, 2,741.72 and 1,102.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,986.68 : 2,741.72 = 1,102.50 : x
2. Step 2: Convert to fraction form
   1,986.68/2,741.72 = 1,102.50/x
3. Step 3: Cross multiply
   1,986.68x = 2,741.72 × 1,102.50
4. Step 4: Simplify right side
   1,986.68x = 3,022,740.79
5. Step 5: Solve for x
   x = 3,022,740.79/1,986.68
6. Step 6: Final answer
   x = 1,521.50