Finding the Third Proportional to 55,512 and 88,290

Step by Step Solution

1. Step 1: Write the proportion equation
   55,512 : 88,290 = 88,290 : x
2. Step 2: Convert to fraction form
   55,512/88,290 = 88,290/x
3. Step 3: Cross multiply
   55,512x = 88,290 × 88,290
4. Step 4: Simplify right side
   55,512x = 7,795,124,100
5. Step 5: Solve for x
   x = 7,795,124,100/55,512
6. Step 6: Final answer
   x = 140,422.32