Finding the Third Proportional to 111,551.63 and 217,498.50

Step by Step Solution

1. Step 1: Write the proportion equation
   111,551.63 : 217,498.50 = 217,498.50 : x
2. Step 2: Convert to fraction form
   111,551.63/217,498.50 = 217,498.50/x
3. Step 3: Cross multiply
   111,551.63x = 217,498.50 × 217,498.50
4. Step 4: Simplify right side
   111,551.63x = 47,305,597,502.25
5. Step 5: Solve for x
   x = 47,305,597,502.25/111,551.63
6. Step 6: Final answer
   x = 424,069.10