Finding the Fourth Proportional to 9,384.86, 12,950.74 and 5,405.18

Step by Step Solution

1. Step 1: Write the proportion equation
   9,384.86 : 12,950.74 = 5,405.18 : x
2. Step 2: Convert to fraction form
   9,384.86/12,950.74 = 5,405.18/x
3. Step 3: Cross multiply
   9,384.86x = 12,950.74 × 5,405.18
4. Step 4: Simplify right side
   9,384.86x = 70,001,065.28
5. Step 5: Solve for x
   x = 70,001,065.28/9,384.86
6. Step 6: Final answer
   x = 7,458.93