Finding the Fourth Proportional to 9,364.88, 12,926.42 and 5,388.63

Step by Step Solution

1. Step 1: Write the proportion equation
   9,364.88 : 12,926.42 = 5,388.63 : x
2. Step 2: Convert to fraction form
   9,364.88/12,926.42 = 5,388.63/x
3. Step 3: Cross multiply
   9,364.88x = 12,926.42 × 5,388.63
4. Step 4: Simplify right side
   9,364.88x = 69,655,639.39
5. Step 5: Solve for x
   x = 69,655,639.39/9,364.88
6. Step 6: Final answer
   x = 7,437.96