Finding the Third Proportional to 69,011.50 and 140,558

Step by Step Solution

1. Step 1: Write the proportion equation
   69,011.50 : 140,558 = 140,558 : x
2. Step 2: Convert to fraction form
   69,011.50/140,558 = 140,558/x
3. Step 3: Cross multiply
   69,011.50x = 140,558 × 140,558
4. Step 4: Simplify right side
   69,011.50x = 19,756,551,364
5. Step 5: Solve for x
   x = 19,756,551,364/69,011.50
6. Step 6: Final answer
   x = 286,279.12