Finding the Third Proportional to 156,040 and 335,780

Step by Step Solution

1. Step 1: Write the proportion equation
   156,040 : 335,780 = 335,780 : x
2. Step 2: Convert to fraction form
   156,040/335,780 = 335,780/x
3. Step 3: Cross multiply
   156,040x = 335,780 × 335,780
4. Step 4: Simplify right side
   156,040x = 112,748,208,400
5. Step 5: Solve for x
   x = 112,748,208,400/156,040
6. Step 6: Final answer
   x = 722,559.65