Finding the Fourth Proportional to 1,561.34, 2,151.69 and 1,118.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,561.34 : 2,151.69 = 1,118.48 : x
2. Step 2: Convert to fraction form
   1,561.34/2,151.69 = 1,118.48/x
3. Step 3: Cross multiply
   1,561.34x = 2,151.69 × 1,118.48
4. Step 4: Simplify right side
   1,561.34x = 2,406,622.23
5. Step 5: Solve for x
   x = 2,406,622.23/1,561.34
6. Step 6: Final answer
   x = 1,541.38