Finding the Third Proportional to 59,296.50 and 128,430

Step by Step Solution

1. Step 1: Write the proportion equation
   59,296.50 : 128,430 = 128,430 : x
2. Step 2: Convert to fraction form
   59,296.50/128,430 = 128,430/x
3. Step 3: Cross multiply
   59,296.50x = 128,430 × 128,430
4. Step 4: Simplify right side
   59,296.50x = 16,494,264,900
5. Step 5: Solve for x
   x = 16,494,264,900/59,296.50
6. Step 6: Final answer
   x = 278,165.91