Finding the Third Proportional to 432,358 and 687,029.50

Step by Step Solution

1. Step 1: Write the proportion equation
   432,358 : 687,029.50 = 687,029.50 : x
2. Step 2: Convert to fraction form
   432,358/687,029.50 = 687,029.50/x
3. Step 3: Cross multiply
   432,358x = 687,029.50 × 687,029.50
4. Step 4: Simplify right side
   432,358x = 472,009,533,870.25
5. Step 5: Solve for x
   x = 472,009,533,870.25/432,358
6. Step 6: Final answer
   x = 1,091,709.96