Finding the Fourth Proportional to 13,291.78, 19,926.34 and 5,892.20

Step by Step Solution

1. Step 1: Write the proportion equation
   13,291.78 : 19,926.34 = 5,892.20 : x
2. Step 2: Convert to fraction form
   13,291.78/19,926.34 = 5,892.20/x
3. Step 3: Cross multiply
   13,291.78x = 19,926.34 × 5,892.20
4. Step 4: Simplify right side
   13,291.78x = 117,409,980.55
5. Step 5: Solve for x
   x = 117,409,980.55/13,291.78
6. Step 6: Final answer
   x = 8,833.28