Finding the Third Proportional to 238,090 and 508,470

Step by Step Solution

1. Step 1: Write the proportion equation
   238,090 : 508,470 = 508,470 : x
2. Step 2: Convert to fraction form
   238,090/508,470 = 508,470/x
3. Step 3: Cross multiply
   238,090x = 508,470 × 508,470
4. Step 4: Simplify right side
   238,090x = 258,541,740,900
5. Step 5: Solve for x
   x = 258,541,740,900/238,090
6. Step 6: Final answer
   x = 1,085,899.20