Finding the Fourth Proportional to 1,635.59, 2,256.37 and 972.07

Step by Step Solution

1. Step 1: Write the proportion equation
   1,635.59 : 2,256.37 = 972.07 : x
2. Step 2: Convert to fraction form
   1,635.59/2,256.37 = 972.07/x
3. Step 3: Cross multiply
   1,635.59x = 2,256.37 × 972.07
4. Step 4: Simplify right side
   1,635.59x = 2,193,346.98
5. Step 5: Solve for x
   x = 2,193,346.98/1,635.59
6. Step 6: Final answer
   x = 1,341.01