Finding the Fourth Proportional to 67,861.81, 101,792.72 and 21,105.37

Step by Step Solution

1. Step 1: Write the proportion equation
   67,861.81 : 101,792.72 = 21,105.37 : x
2. Step 2: Convert to fraction form
   67,861.81/101,792.72 = 21,105.37/x
3. Step 3: Cross multiply
   67,861.81x = 101,792.72 × 21,105.37
4. Step 4: Simplify right side
   67,861.81x = 2,148,373,018.91
5. Step 5: Solve for x
   x = 2,148,373,018.91/67,861.81
6. Step 6: Final answer
   x = 31,658.06