Finding the Fourth Proportional to 15,587.54, 21,510.56 and 8,513.81

Step by Step Solution

1. Step 1: Write the proportion equation
   15,587.54 : 21,510.56 = 8,513.81 : x
2. Step 2: Convert to fraction form
   15,587.54/21,510.56 = 8,513.81/x
3. Step 3: Cross multiply
   15,587.54x = 21,510.56 × 8,513.81
4. Step 4: Simplify right side
   15,587.54x = 183,136,820.83
5. Step 5: Solve for x
   x = 183,136,820.83/15,587.54
6. Step 6: Final answer
   x = 11,748.92