Finding the Third Proportional to 291,273.50 and 393,528

Step by Step Solution

1. Step 1: Write the proportion equation
   291,273.50 : 393,528 = 393,528 : x
2. Step 2: Convert to fraction form
   291,273.50/393,528 = 393,528/x
3. Step 3: Cross multiply
   291,273.50x = 393,528 × 393,528
4. Step 4: Simplify right side
   291,273.50x = 154,864,286,784
5. Step 5: Solve for x
   x = 154,864,286,784/291,273.50
6. Step 6: Final answer
   x = 531,679.97