Finding the Third Proportional to 254,640 and 553,087.50

Step by Step Solution

1. Step 1: Write the proportion equation
   254,640 : 553,087.50 = 553,087.50 : x
2. Step 2: Convert to fraction form
   254,640/553,087.50 = 553,087.50/x
3. Step 3: Cross multiply
   254,640x = 553,087.50 × 553,087.50
4. Step 4: Simplify right side
   254,640x = 305,905,782,656.25
5. Step 5: Solve for x
   x = 305,905,782,656.25/254,640
6. Step 6: Final answer
   x = 1,201,326.51