Finding the Fourth Proportional to 1,971.86, 2,721.20 and 1,087.67

Step by Step Solution

1. Step 1: Write the proportion equation
   1,971.86 : 2,721.20 = 1,087.67 : x
2. Step 2: Convert to fraction form
   1,971.86/2,721.20 = 1,087.67/x
3. Step 3: Cross multiply
   1,971.86x = 2,721.20 × 1,087.67
4. Step 4: Simplify right side
   1,971.86x = 2,959,756.72
5. Step 5: Solve for x
   x = 2,959,756.72/1,971.86
6. Step 6: Final answer
   x = 1,501.00