Finding the Fourth Proportional to 1,633.89, 2,254.51 and 970.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,633.89 : 2,254.51 = 970.72 : x
2. Step 2: Convert to fraction form
   1,633.89/2,254.51 = 970.72/x
3. Step 3: Cross multiply
   1,633.89x = 2,254.51 × 970.72
4. Step 4: Simplify right side
   1,633.89x = 2,188,495.52
5. Step 5: Solve for x
   x = 2,188,495.52/1,633.89
6. Step 6: Final answer
   x = 1,339.44