Finding the Fourth Proportional to 9,156.52, 12,631.74 and 5,378.46

Step by Step Solution

1. Step 1: Write the proportion equation
   9,156.52 : 12,631.74 = 5,378.46 : x
2. Step 2: Convert to fraction form
   9,156.52/12,631.74 = 5,378.46/x
3. Step 3: Cross multiply
   9,156.52x = 12,631.74 × 5,378.46
4. Step 4: Simplify right side
   9,156.52x = 67,939,308.32
5. Step 5: Solve for x
   x = 67,939,308.32/9,156.52
6. Step 6: Final answer
   x = 7,419.77