Finding the Third Proportional to 72,407 and 99,534

Step by Step Solution

1. Step 1: Write the proportion equation
   72,407 : 99,534 = 99,534 : x
2. Step 2: Convert to fraction form
   72,407/99,534 = 99,534/x
3. Step 3: Cross multiply
   72,407x = 99,534 × 99,534
4. Step 4: Simplify right side
   72,407x = 9,907,017,156
5. Step 5: Solve for x
   x = 9,907,017,156/72,407
6. Step 6: Final answer
   x = 136,824.02