Finding the Fourth Proportional to 9,386.01, 12,951.90 and 5,406.48

Step by Step Solution

1. Step 1: Write the proportion equation
   9,386.01 : 12,951.90 = 5,406.48 : x
2. Step 2: Convert to fraction form
   9,386.01/12,951.90 = 5,406.48/x
3. Step 3: Cross multiply
   9,386.01x = 12,951.90 × 5,406.48
4. Step 4: Simplify right side
   9,386.01x = 70,024,188.31
5. Step 5: Solve for x
   x = 70,024,188.31/9,386.01
6. Step 6: Final answer
   x = 7,460.49