Finding the Fourth Proportional to 28,238.78, 42,349.32 and 10,224.72

Step by Step Solution

1. Step 1: Write the proportion equation
   28,238.78 : 42,349.32 = 10,224.72 : x
2. Step 2: Convert to fraction form
   28,238.78/42,349.32 = 10,224.72/x
3. Step 3: Cross multiply
   28,238.78x = 42,349.32 × 10,224.72
4. Step 4: Simplify right side
   28,238.78x = 433,009,939.19
5. Step 5: Solve for x
   x = 433,009,939.19/28,238.78
6. Step 6: Final answer
   x = 15,333.88