Finding the Fourth Proportional to 9,402.88, 12,973.02 and 5,423.48

Step by Step Solution

1. Step 1: Write the proportion equation
   9,402.88 : 12,973.02 = 5,423.48 : x
2. Step 2: Convert to fraction form
   9,402.88/12,973.02 = 5,423.48/x
3. Step 3: Cross multiply
   9,402.88x = 12,973.02 × 5,423.48
4. Step 4: Simplify right side
   9,402.88x = 70,358,914.51
5. Step 5: Solve for x
   x = 70,358,914.51/9,402.88
6. Step 6: Final answer
   x = 7,482.70