Finding the Fourth Proportional to 9,381.12, 12,948.71 and 5,405.03

Step by Step Solution

1. Step 1: Write the proportion equation
   9,381.12 : 12,948.71 = 5,405.03 : x
2. Step 2: Convert to fraction form
   9,381.12/12,948.71 = 5,405.03/x
3. Step 3: Cross multiply
   9,381.12x = 12,948.71 × 5,405.03
4. Step 4: Simplify right side
   9,381.12x = 69,988,153.20
5. Step 5: Solve for x
   x = 69,988,153.20/9,381.12
6. Step 6: Final answer
   x = 7,460.54