Finding the Fourth Proportional to 9,384.67, 12,950.47 and 5,405.91

Step by Step Solution

1. Step 1: Write the proportion equation
   9,384.67 : 12,950.47 = 5,405.91 : x
2. Step 2: Convert to fraction form
   9,384.67/12,950.47 = 5,405.91/x
3. Step 3: Cross multiply
   9,384.67x = 12,950.47 × 5,405.91
4. Step 4: Simplify right side
   9,384.67x = 70,009,075.28
5. Step 5: Solve for x
   x = 70,009,075.28/9,384.67
6. Step 6: Final answer
   x = 7,459.94