Finding the Fourth Proportional to 9,213.42, 12,715.01 and 5,438.77

Step by Step Solution

1. Step 1: Write the proportion equation
   9,213.42 : 12,715.01 = 5,438.77 : x
2. Step 2: Convert to fraction form
   9,213.42/12,715.01 = 5,438.77/x
3. Step 3: Cross multiply
   9,213.42x = 12,715.01 × 5,438.77
4. Step 4: Simplify right side
   9,213.42x = 69,154,014.94
5. Step 5: Solve for x
   x = 69,154,014.94/9,213.42
6. Step 6: Final answer
   x = 7,505.79