Finding the Fourth Proportional to 42,892.42, 64,339.80 and 11,727.67

Step by Step Solution

1. Step 1: Write the proportion equation
   42,892.42 : 64,339.80 = 11,727.67 : x
2. Step 2: Convert to fraction form
   42,892.42/64,339.80 = 11,727.67/x
3. Step 3: Cross multiply
   42,892.42x = 64,339.80 × 11,727.67
4. Step 4: Simplify right side
   42,892.42x = 754,555,942.27
5. Step 5: Solve for x
   x = 754,555,942.27/42,892.42
6. Step 6: Final answer
   x = 17,591.82