Finding the Third Proportional to 221,725.50 and 342,429

Step by Step Solution

1. Step 1: Write the proportion equation
   221,725.50 : 342,429 = 342,429 : x
2. Step 2: Convert to fraction form
   221,725.50/342,429 = 342,429/x
3. Step 3: Cross multiply
   221,725.50x = 342,429 × 342,429
4. Step 4: Simplify right side
   221,725.50x = 117,257,620,041
5. Step 5: Solve for x
   x = 117,257,620,041/221,725.50
6. Step 6: Final answer
   x = 528,841.38