Finding the Third Proportional to 88,905 and 137,569.50

Step by Step Solution

1. Step 1: Write the proportion equation
   88,905 : 137,569.50 = 137,569.50 : x
2. Step 2: Convert to fraction form
   88,905/137,569.50 = 137,569.50/x
3. Step 3: Cross multiply
   88,905x = 137,569.50 × 137,569.50
4. Step 4: Simplify right side
   88,905x = 18,925,367,330.25
5. Step 5: Solve for x
   x = 18,925,367,330.25/88,905
6. Step 6: Final answer
   x = 212,871.80