Finding the Third Proportional to 158,557.50 and 342,603

Step by Step Solution

1. Step 1: Write the proportion equation
   158,557.50 : 342,603 = 342,603 : x
2. Step 2: Convert to fraction form
   158,557.50/342,603 = 342,603/x
3. Step 3: Cross multiply
   158,557.50x = 342,603 × 342,603
4. Step 4: Simplify right side
   158,557.50x = 117,376,815,609
5. Step 5: Solve for x
   x = 117,376,815,609/158,557.50
6. Step 6: Final answer
   x = 740,279.18