Finding the Fourth Proportional to 34,128.72, 51,193.89 and 10,436.76

Step by Step Solution

1. Step 1: Write the proportion equation
   34,128.72 : 51,193.89 = 10,436.76 : x
2. Step 2: Convert to fraction form
   34,128.72/51,193.89 = 10,436.76/x
3. Step 3: Cross multiply
   34,128.72x = 51,193.89 × 10,436.76
4. Step 4: Simplify right side
   34,128.72x = 534,298,343.40
5. Step 5: Solve for x
   x = 534,298,343.40/34,128.72
6. Step 6: Final answer
   x = 15,655.39