Finding the Fourth Proportional to 1,981, 2,971.48 and 1,860.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,981 : 2,971.48 = 1,860.72 : x
2. Step 2: Convert to fraction form
   1,981/2,971.48 = 1,860.72/x
3. Step 3: Cross multiply
   1,981x = 2,971.48 × 1,860.72
4. Step 4: Simplify right side
   1,981x = 5,529,092.27
5. Step 5: Solve for x
   x = 5,529,092.27/1,981
6. Step 6: Final answer
   x = 2,791.06