Finding the Third Proportional to 69,318 and 99,128.25

Step by Step Solution

1. Step 1: Write the proportion equation
   69,318 : 99,128.25 = 99,128.25 : x
2. Step 2: Convert to fraction form
   69,318/99,128.25 = 99,128.25/x
3. Step 3: Cross multiply
   69,318x = 99,128.25 × 99,128.25
4. Step 4: Simplify right side
   69,318x = 9,826,409,948.06
5. Step 5: Solve for x
   x = 9,826,409,948.06/69,318
6. Step 6: Final answer
   x = 141,758.42