Finding the Fourth Proportional to 9,362.81, 12,920.67 and 5,384.70

Step by Step Solution

1. Step 1: Write the proportion equation
   9,362.81 : 12,920.67 = 5,384.70 : x
2. Step 2: Convert to fraction form
   9,362.81/12,920.67 = 5,384.70/x
3. Step 3: Cross multiply
   9,362.81x = 12,920.67 × 5,384.70
4. Step 4: Simplify right side
   9,362.81x = 69,573,931.75
5. Step 5: Solve for x
   x = 69,573,931.75/9,362.81
6. Step 6: Final answer
   x = 7,430.89