Finding the Fourth Proportional to 1,986.08, 2,978.51 and 1,373.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,986.08 : 2,978.51 = 1,373.72 : x
2. Step 2: Convert to fraction form
   1,986.08/2,978.51 = 1,373.72/x
3. Step 3: Cross multiply
   1,986.08x = 2,978.51 × 1,373.72
4. Step 4: Simplify right side
   1,986.08x = 4,091,642.19
5. Step 5: Solve for x
   x = 4,091,642.19/1,986.08
6. Step 6: Final answer
   x = 2,060.16