Finding the Fourth Proportional to 1,988.05, 2,743.60 and 1,148.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,988.05 : 2,743.60 = 1,148.86 : x
2. Step 2: Convert to fraction form
   1,988.05/2,743.60 = 1,148.86/x
3. Step 3: Cross multiply
   1,988.05x = 2,743.60 × 1,148.86
4. Step 4: Simplify right side
   1,988.05x = 3,152,006.55
5. Step 5: Solve for x
   x = 3,152,006.55/1,988.05
6. Step 6: Final answer
   x = 1,585.48