Finding the Fourth Proportional to 9,385.03, 12,952.88 and 5,405.47

Step by Step Solution

1. Step 1: Write the proportion equation
   9,385.03 : 12,952.88 = 5,405.47 : x
2. Step 2: Convert to fraction form
   9,385.03/12,952.88 = 5,405.47/x
3. Step 3: Cross multiply
   9,385.03x = 12,952.88 × 5,405.47
4. Step 4: Simplify right side
   9,385.03x = 70,016,365.11
5. Step 5: Solve for x
   x = 70,016,365.11/9,385.03
6. Step 6: Final answer
   x = 7,460.43