Finding the Fourth Proportional to 1,560.51, 2,153.72 and 897.35

Step by Step Solution

1. Step 1: Write the proportion equation
   1,560.51 : 2,153.72 = 897.35 : x
2. Step 2: Convert to fraction form
   1,560.51/2,153.72 = 897.35/x
3. Step 3: Cross multiply
   1,560.51x = 2,153.72 × 897.35
4. Step 4: Simplify right side
   1,560.51x = 1,932,627.07
5. Step 5: Solve for x
   x = 1,932,627.07/1,560.51
6. Step 6: Final answer
   x = 1,238.46