Finding the Third Proportional to 56,689 and 88,479

Step by Step Solution

1. Step 1: Write the proportion equation
   56,689 : 88,479 = 88,479 : x
2. Step 2: Convert to fraction form
   56,689/88,479 = 88,479/x
3. Step 3: Cross multiply
   56,689x = 88,479 × 88,479
4. Step 4: Simplify right side
   56,689x = 7,828,533,441
5. Step 5: Solve for x
   x = 7,828,533,441/56,689
6. Step 6: Final answer
   x = 138,096.16