Finding the Third Proportional to 238,020 and 515,222

Step by Step Solution

1. Step 1: Write the proportion equation
   238,020 : 515,222 = 515,222 : x
2. Step 2: Convert to fraction form
   238,020/515,222 = 515,222/x
3. Step 3: Cross multiply
   238,020x = 515,222 × 515,222
4. Step 4: Simplify right side
   238,020x = 265,453,709,284
5. Step 5: Solve for x
   x = 265,453,709,284/238,020
6. Step 6: Final answer
   x = 1,115,258.00