Finding the Third Proportional to 42,099 and 70,155

Step by Step Solution

1. Step 1: Write the proportion equation
   42,099 : 70,155 = 70,155 : x
2. Step 2: Convert to fraction form
   42,099/70,155 = 70,155/x
3. Step 3: Cross multiply
   42,099x = 70,155 × 70,155
4. Step 4: Simplify right side
   42,099x = 4,921,724,025
5. Step 5: Solve for x
   x = 4,921,724,025/42,099
6. Step 6: Final answer
   x = 116,908.34