Finding the Fourth Proportional to 1,971.40, 2,956.72 and 738.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,971.40 : 2,956.72 = 738.72 : x
2. Step 2: Convert to fraction form
   1,971.40/2,956.72 = 738.72/x
3. Step 3: Cross multiply
   1,971.40x = 2,956.72 × 738.72
4. Step 4: Simplify right side
   1,971.40x = 2,184,188.20
5. Step 5: Solve for x
   x = 2,184,188.20/1,971.40
6. Step 6: Final answer
   x = 1,107.94