Finding the Fourth Proportional to 1,986.86, 2,741.46 and 1,200.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,986.86 : 2,741.46 = 1,200.76 : x
2. Step 2: Convert to fraction form
   1,986.86/2,741.46 = 1,200.76/x
3. Step 3: Cross multiply
   1,986.86x = 2,741.46 × 1,200.76
4. Step 4: Simplify right side
   1,986.86x = 3,291,835.51
5. Step 5: Solve for x
   x = 3,291,835.51/1,986.86
6. Step 6: Final answer
   x = 1,656.80