Finding the Third Proportional to 90,220 and 137,454

Step by Step Solution

1. Step 1: Write the proportion equation
   90,220 : 137,454 = 137,454 : x
2. Step 2: Convert to fraction form
   90,220/137,454 = 137,454/x
3. Step 3: Cross multiply
   90,220x = 137,454 × 137,454
4. Step 4: Simplify right side
   90,220x = 18,893,602,116
5. Step 5: Solve for x
   x = 18,893,602,116/90,220
6. Step 6: Final answer
   x = 209,417.00