Finding the Third Proportional to 152,978.63 and 336,240

Step by Step Solution

1. Step 1: Write the proportion equation
   152,978.63 : 336,240 = 336,240 : x
2. Step 2: Convert to fraction form
   152,978.63/336,240 = 336,240/x
3. Step 3: Cross multiply
   152,978.63x = 336,240 × 336,240
4. Step 4: Simplify right side
   152,978.63x = 113,057,337,600
5. Step 5: Solve for x
   x = 113,057,337,600/152,978.63
6. Step 6: Final answer
   x = 739,040.10