Finding the Fourth Proportional to 3,666.72, 5,059.98 and 1,988.08

Step by Step Solution

1. Step 1: Write the proportion equation
   3,666.72 : 5,059.98 = 1,988.08 : x
2. Step 2: Convert to fraction form
   3,666.72/5,059.98 = 1,988.08/x
3. Step 3: Cross multiply
   3,666.72x = 5,059.98 × 1,988.08
4. Step 4: Simplify right side
   3,666.72x = 10,059,656.53
5. Step 5: Solve for x
   x = 10,059,656.53/3,666.72
6. Step 6: Final answer
   x = 2,743.50