Finding the Third Proportional to 90,630 and 137,803.50

Step by Step Solution

1. Step 1: Write the proportion equation
   90,630 : 137,803.50 = 137,803.50 : x
2. Step 2: Convert to fraction form
   90,630/137,803.50 = 137,803.50/x
3. Step 3: Cross multiply
   90,630x = 137,803.50 × 137,803.50
4. Step 4: Simplify right side
   90,630x = 18,989,804,612.25
5. Step 5: Solve for x
   x = 18,989,804,612.25/90,630
6. Step 6: Final answer
   x = 209,531.11