Finding the Fourth Proportional to 1,101.89, 1,651.62 and 972.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,101.89 : 1,651.62 = 972.02 : x
2. Step 2: Convert to fraction form
   1,101.89/1,651.62 = 972.02/x
3. Step 3: Cross multiply
   1,101.89x = 1,651.62 × 972.02
4. Step 4: Simplify right side
   1,101.89x = 1,605,407.67
5. Step 5: Solve for x
   x = 1,605,407.67/1,101.89
6. Step 6: Final answer
   x = 1,456.96