Finding the Fourth Proportional to 13,255.78, 19,886.10 and 5,460.34

Step by Step Solution

1. Step 1: Write the proportion equation
   13,255.78 : 19,886.10 = 5,460.34 : x
2. Step 2: Convert to fraction form
   13,255.78/19,886.10 = 5,460.34/x
3. Step 3: Cross multiply
   13,255.78x = 19,886.10 × 5,460.34
4. Step 4: Simplify right side
   13,255.78x = 108,584,867.27
5. Step 5: Solve for x
   x = 108,584,867.27/13,255.78
6. Step 6: Final answer
   x = 8,191.51