Finding the Fourth Proportional to 42,896.34, 64,337.31 and 11,726.10

Step by Step Solution

1. Step 1: Write the proportion equation
   42,896.34 : 64,337.31 = 11,726.10 : x
2. Step 2: Convert to fraction form
   42,896.34/64,337.31 = 11,726.10/x
3. Step 3: Cross multiply
   42,896.34x = 64,337.31 × 11,726.10
4. Step 4: Simplify right side
   42,896.34x = 754,425,730.79
5. Step 5: Solve for x
   x = 754,425,730.79/42,896.34
6. Step 6: Final answer
   x = 17,587.18