Finding the Fourth Proportional to 9,385.98, 12,957.34 and 5,406.32

Step by Step Solution

1. Step 1: Write the proportion equation
   9,385.98 : 12,957.34 = 5,406.32 : x
2. Step 2: Convert to fraction form
   9,385.98/12,957.34 = 5,406.32/x
3. Step 3: Cross multiply
   9,385.98x = 12,957.34 × 5,406.32
4. Step 4: Simplify right side
   9,385.98x = 70,051,526.39
5. Step 5: Solve for x
   x = 70,051,526.39/9,385.98
6. Step 6: Final answer
   x = 7,463.42