Finding the Fourth Proportional to 11,445.90, 17,136.42 and 7,275.54

Step by Step Solution

1. Step 1: Write the proportion equation
   11,445.90 : 17,136.42 = 7,275.54 : x
2. Step 2: Convert to fraction form
   11,445.90/17,136.42 = 7,275.54/x
3. Step 3: Cross multiply
   11,445.90x = 17,136.42 × 7,275.54
4. Step 4: Simplify right side
   11,445.90x = 124,676,709.17
5. Step 5: Solve for x
   x = 124,676,709.17/11,445.90
6. Step 6: Final answer
   x = 10,892.70