Finding the Third Proportional to 57,621 and 88,890

Step by Step Solution

1. Step 1: Write the proportion equation
   57,621 : 88,890 = 88,890 : x
2. Step 2: Convert to fraction form
   57,621/88,890 = 88,890/x
3. Step 3: Cross multiply
   57,621x = 88,890 × 88,890
4. Step 4: Simplify right side
   57,621x = 7,901,432,100
5. Step 5: Solve for x
   x = 7,901,432,100/57,621
6. Step 6: Final answer
   x = 137,127.65