Finding the Third Proportional to 318,302 and 432,547.50

Step by Step Solution

1. Step 1: Write the proportion equation
   318,302 : 432,547.50 = 432,547.50 : x
2. Step 2: Convert to fraction form
   318,302/432,547.50 = 432,547.50/x
3. Step 3: Cross multiply
   318,302x = 432,547.50 × 432,547.50
4. Step 4: Simplify right side
   318,302x = 187,097,339,756.25
5. Step 5: Solve for x
   x = 187,097,339,756.25/318,302
6. Step 6: Final answer
   x = 587,798.19