Finding the Fourth Proportional to 1,987.59, 2,742.42 and 1,201.62

Step by Step Solution

1. Step 1: Write the proportion equation
   1,987.59 : 2,742.42 = 1,201.62 : x
2. Step 2: Convert to fraction form
   1,987.59/2,742.42 = 1,201.62/x
3. Step 3: Cross multiply
   1,987.59x = 2,742.42 × 1,201.62
4. Step 4: Simplify right side
   1,987.59x = 3,295,346.72
5. Step 5: Solve for x
   x = 3,295,346.72/1,987.59
6. Step 6: Final answer
   x = 1,657.96