Finding the Third Proportional to 69,279.75 and 148,036.50

Step by Step Solution

1. Step 1: Write the proportion equation
   69,279.75 : 148,036.50 = 148,036.50 : x
2. Step 2: Convert to fraction form
   69,279.75/148,036.50 = 148,036.50/x
3. Step 3: Cross multiply
   69,279.75x = 148,036.50 × 148,036.50
4. Step 4: Simplify right side
   69,279.75x = 21,914,805,332.25
5. Step 5: Solve for x
   x = 21,914,805,332.25/69,279.75
6. Step 6: Final answer
   x = 316,323.39