Finding the Fourth Proportional to 9,015.48, 12,441.45 and 5,430.87

Step by Step Solution

1. Step 1: Write the proportion equation
   9,015.48 : 12,441.45 = 5,430.87 : x
2. Step 2: Convert to fraction form
   9,015.48/12,441.45 = 5,430.87/x
3. Step 3: Cross multiply
   9,015.48x = 12,441.45 × 5,430.87
4. Step 4: Simplify right side
   9,015.48x = 67,567,897.56
5. Step 5: Solve for x
   x = 67,567,897.56/9,015.48
6. Step 6: Final answer
   x = 7,494.65