Finding the Third Proportional to 57,408 and 88,712

Step by Step Solution

1. Step 1: Write the proportion equation
   57,408 : 88,712 = 88,712 : x
2. Step 2: Convert to fraction form
   57,408/88,712 = 88,712/x
3. Step 3: Cross multiply
   57,408x = 88,712 × 88,712
4. Step 4: Simplify right side
   57,408x = 7,869,818,944
5. Step 5: Solve for x
   x = 7,869,818,944/57,408
6. Step 6: Final answer
   x = 137,085.75