Finding the Fourth Proportional to 2,991.64, 4,128.52 and 1,732.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,991.64 : 4,128.52 = 1,732.72 : x
2. Step 2: Convert to fraction form
   2,991.64/4,128.52 = 1,732.72/x
3. Step 3: Cross multiply
   2,991.64x = 4,128.52 × 1,732.72
4. Step 4: Simplify right side
   2,991.64x = 7,153,569.17
5. Step 5: Solve for x
   x = 7,153,569.17/2,991.64
6. Step 6: Final answer
   x = 2,391.19