Finding the Fourth Proportional to 13,356.79, 20,036.52 and 4,590.55

Step by Step Solution

1. Step 1: Write the proportion equation
   13,356.79 : 20,036.52 = 4,590.55 : x
2. Step 2: Convert to fraction form
   13,356.79/20,036.52 = 4,590.55/x
3. Step 3: Cross multiply
   13,356.79x = 20,036.52 × 4,590.55
4. Step 4: Simplify right side
   13,356.79x = 91,978,646.89
5. Step 5: Solve for x
   x = 91,978,646.89/13,356.79
6. Step 6: Final answer
   x = 6,886.28