Finding the Fourth Proportional to 1,635.29, 2,256.71 and 972.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,635.29 : 2,256.71 = 972.47 : x
2. Step 2: Convert to fraction form
   1,635.29/2,256.71 = 972.47/x
3. Step 3: Cross multiply
   1,635.29x = 2,256.71 × 972.47
4. Step 4: Simplify right side
   1,635.29x = 2,194,566.63
5. Step 5: Solve for x
   x = 2,194,566.63/1,635.29
6. Step 6: Final answer
   x = 1,342.01