Finding the Third Proportional to 390,068 and 582,528

Step by Step Solution

1. Step 1: Write the proportion equation
   390,068 : 582,528 = 582,528 : x
2. Step 2: Convert to fraction form
   390,068/582,528 = 582,528/x
3. Step 3: Cross multiply
   390,068x = 582,528 × 582,528
4. Step 4: Simplify right side
   390,068x = 339,338,870,784
5. Step 5: Solve for x
   x = 339,338,870,784/390,068
6. Step 6: Final answer
   x = 869,947.99