Finding the Fourth Proportional to 1,200.84, 1,802.10 and 653.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,200.84 : 1,802.10 = 653.28 : x
2. Step 2: Convert to fraction form
   1,200.84/1,802.10 = 653.28/x
3. Step 3: Cross multiply
   1,200.84x = 1,802.10 × 653.28
4. Step 4: Simplify right side
   1,200.84x = 1,177,275.89
5. Step 5: Solve for x
   x = 1,177,275.89/1,200.84
6. Step 6: Final answer
   x = 980.38