Finding the Fourth Proportional to 12,152.31, 18,221.28 and 4,748.19

Step by Step Solution

1. Step 1: Write the proportion equation
   12,152.31 : 18,221.28 = 4,748.19 : x
2. Step 2: Convert to fraction form
   12,152.31/18,221.28 = 4,748.19/x
3. Step 3: Cross multiply
   12,152.31x = 18,221.28 × 4,748.19
4. Step 4: Simplify right side
   12,152.31x = 86,518,099.48
5. Step 5: Solve for x
   x = 86,518,099.48/12,152.31
6. Step 6: Final answer
   x = 7,119.48