Finding the Fourth Proportional to 12,788.45, 19,185.29 and 5,392.91

Step by Step Solution

1. Step 1: Write the proportion equation
   12,788.45 : 19,185.29 = 5,392.91 : x
2. Step 2: Convert to fraction form
   12,788.45/19,185.29 = 5,392.91/x
3. Step 3: Cross multiply
   12,788.45x = 19,185.29 × 5,392.91
4. Step 4: Simplify right side
   12,788.45x = 103,464,583.52
5. Step 5: Solve for x
   x = 103,464,583.52/12,788.45
6. Step 6: Final answer
   x = 8,090.47