Finding the Fourth Proportional to 12,700.88, 19,038.69 and 8,531.30

Step by Step Solution

1. Step 1: Write the proportion equation
   12,700.88 : 19,038.69 = 8,531.30 : x
2. Step 2: Convert to fraction form
   12,700.88/19,038.69 = 8,531.30/x
3. Step 3: Cross multiply
   12,700.88x = 19,038.69 × 8,531.30
4. Step 4: Simplify right side
   12,700.88x = 162,424,823.59
5. Step 5: Solve for x
   x = 162,424,823.59/12,700.88
6. Step 6: Final answer
   x = 12,788.48