Finding the Fourth Proportional to 1,768.72, 2,440.87 and 972.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,768.72 : 2,440.87 = 972.06 : x
2. Step 2: Convert to fraction form
   1,768.72/2,440.87 = 972.06/x
3. Step 3: Cross multiply
   1,768.72x = 2,440.87 × 972.06
4. Step 4: Simplify right side
   1,768.72x = 2,372,659.89
5. Step 5: Solve for x
   x = 2,372,659.89/1,768.72
6. Step 6: Final answer
   x = 1,341.46