Finding the Fourth Proportional to 1,622.88, 2,430.56 and 972.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,622.88 : 2,430.56 = 972.18 : x
2. Step 2: Convert to fraction form
   1,622.88/2,430.56 = 972.18/x
3. Step 3: Cross multiply
   1,622.88x = 2,430.56 × 972.18
4. Step 4: Simplify right side
   1,622.88x = 2,362,941.82
5. Step 5: Solve for x
   x = 2,362,941.82/1,622.88
6. Step 6: Final answer
   x = 1,456.02