Finding the Third Proportional to 90,841.50 and 137,902.50

Step by Step Solution

1. Step 1: Write the proportion equation
   90,841.50 : 137,902.50 = 137,902.50 : x
2. Step 2: Convert to fraction form
   90,841.50/137,902.50 = 137,902.50/x
3. Step 3: Cross multiply
   90,841.50x = 137,902.50 × 137,902.50
4. Step 4: Simplify right side
   90,841.50x = 19,017,099,506.25
5. Step 5: Solve for x
   x = 19,017,099,506.25/90,841.50
6. Step 6: Final answer
   x = 209,343.74