Finding the Fourth Proportional to 3,569.79, 5,354.63 and 972.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,569.79 : 5,354.63 = 972.72 : x
2. Step 2: Convert to fraction form
   3,569.79/5,354.63 = 972.72/x
3. Step 3: Cross multiply
   3,569.79x = 5,354.63 × 972.72
4. Step 4: Simplify right side
   3,569.79x = 5,208,555.69
5. Step 5: Solve for x
   x = 5,208,555.69/3,569.79
6. Step 6: Final answer
   x = 1,459.07