Finding the Third Proportional to 4,237.31 and 8,861.91

Step by Step Solution

1. Step 1: Write the proportion equation
   4,237.31 : 8,861.91 = 8,861.91 : x
2. Step 2: Convert to fraction form
   4,237.31/8,861.91 = 8,861.91/x
3. Step 3: Cross multiply
   4,237.31x = 8,861.91 × 8,861.91
4. Step 4: Simplify right side
   4,237.31x = 78,533,382.38
5. Step 5: Solve for x
   x = 78,533,382.38/4,237.31
6. Step 6: Final answer
   x = 18,533.77