Finding the Fourth Proportional to 42,838.47, 64,250.69 and 11,676.15

Step by Step Solution

1. Step 1: Write the proportion equation
   42,838.47 : 64,250.69 = 11,676.15 : x
2. Step 2: Convert to fraction form
   42,838.47/64,250.69 = 11,676.15/x
3. Step 3: Cross multiply
   42,838.47x = 64,250.69 × 11,676.15
4. Step 4: Simplify right side
   42,838.47x = 750,200,635.66
5. Step 5: Solve for x
   x = 750,200,635.66/42,838.47
6. Step 6: Final answer
   x = 17,512.31