Finding the Third Proportional to 156,090 and 290,022

Step by Step Solution

1. Step 1: Write the proportion equation
   156,090 : 290,022 = 290,022 : x
2. Step 2: Convert to fraction form
   156,090/290,022 = 290,022/x
3. Step 3: Cross multiply
   156,090x = 290,022 × 290,022
4. Step 4: Simplify right side
   156,090x = 84,112,760,484
5. Step 5: Solve for x
   x = 84,112,760,484/156,090
6. Step 6: Final answer
   x = 538,873.47