Finding the Third Proportional to 162,870 and 358,428

Step by Step Solution

1. Step 1: Write the proportion equation
   162,870 : 358,428 = 358,428 : x
2. Step 2: Convert to fraction form
   162,870/358,428 = 358,428/x
3. Step 3: Cross multiply
   162,870x = 358,428 × 358,428
4. Step 4: Simplify right side
   162,870x = 128,470,631,184
5. Step 5: Solve for x
   x = 128,470,631,184/162,870
6. Step 6: Final answer
   x = 788,792.48