Finding the Fourth Proportional to 5,364.86, 7,987.20 and 5,338.89

Step by Step Solution

1. Step 1: Write the proportion equation
   5,364.86 : 7,987.20 = 5,338.89 : x
2. Step 2: Convert to fraction form
   5,364.86/7,987.20 = 5,338.89/x
3. Step 3: Cross multiply
   5,364.86x = 7,987.20 × 5,338.89
4. Step 4: Simplify right side
   5,364.86x = 42,642,782.21
5. Step 5: Solve for x
   x = 42,642,782.21/5,364.86
6. Step 6: Final answer
   x = 7,948.54