Finding the Fourth Proportional to 11,061.39, 16,590.20 and 5,136.51

Step by Step Solution

1. Step 1: Write the proportion equation
   11,061.39 : 16,590.20 = 5,136.51 : x
2. Step 2: Convert to fraction form
   11,061.39/16,590.20 = 5,136.51/x
3. Step 3: Cross multiply
   11,061.39x = 16,590.20 × 5,136.51
4. Step 4: Simplify right side
   11,061.39x = 85,215,728.20
5. Step 5: Solve for x
   x = 85,215,728.20/11,061.39
6. Step 6: Final answer
   x = 7,703.89