Finding the Third Proportional to 219,112.59 and 342,508.50

Step by Step Solution

1. Step 1: Write the proportion equation
   219,112.59 : 342,508.50 = 342,508.50 : x
2. Step 2: Convert to fraction form
   219,112.59/342,508.50 = 342,508.50/x
3. Step 3: Cross multiply
   219,112.59x = 342,508.50 × 342,508.50
4. Step 4: Simplify right side
   219,112.59x = 117,312,072,572.25
5. Step 5: Solve for x
   x = 117,312,072,572.25/219,112.59
6. Step 6: Final answer
   x = 535,396.30