Finding the Fourth Proportional to 11,561.48, 17,354.16 and 7,122.35

Step by Step Solution

1. Step 1: Write the proportion equation
   11,561.48 : 17,354.16 = 7,122.35 : x
2. Step 2: Convert to fraction form
   11,561.48/17,354.16 = 7,122.35/x
3. Step 3: Cross multiply
   11,561.48x = 17,354.16 × 7,122.35
4. Step 4: Simplify right side
   11,561.48x = 123,602,314.71
5. Step 5: Solve for x
   x = 123,602,314.71/11,561.48
6. Step 6: Final answer
   x = 10,690.88