Finding the Fourth Proportional to 1,988.73, 2,978.47 and 1,742.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,988.73 : 2,978.47 = 1,742.69 : x
2. Step 2: Convert to fraction form
   1,988.73/2,978.47 = 1,742.69/x
3. Step 3: Cross multiply
   1,988.73x = 2,978.47 × 1,742.69
4. Step 4: Simplify right side
   1,988.73x = 5,190,549.88
5. Step 5: Solve for x
   x = 5,190,549.88/1,988.73
6. Step 6: Final answer
   x = 2,609.98