Finding the Fourth Proportional to 12,587.28, 18,864.76 and 5,196.93

Step by Step Solution

1. Step 1: Write the proportion equation
   12,587.28 : 18,864.76 = 5,196.93 : x
2. Step 2: Convert to fraction form
   12,587.28/18,864.76 = 5,196.93/x
3. Step 3: Cross multiply
   12,587.28x = 18,864.76 × 5,196.93
4. Step 4: Simplify right side
   12,587.28x = 98,038,837.19
5. Step 5: Solve for x
   x = 98,038,837.19/12,587.28
6. Step 6: Final answer
   x = 7,788.72