Finding the Fourth Proportional to 42,861, 64,292.31 and 11,697.06

Step by Step Solution

1. Step 1: Write the proportion equation
   42,861 : 64,292.31 = 11,697.06 : x
2. Step 2: Convert to fraction form
   42,861/64,292.31 = 11,697.06/x
3. Step 3: Cross multiply
   42,861x = 64,292.31 × 11,697.06
4. Step 4: Simplify right side
   42,861x = 752,031,007.61
5. Step 5: Solve for x
   x = 752,031,007.61/42,861
6. Step 6: Final answer
   x = 17,545.81