Finding the Third Proportional to 156,138 and 335,956.50

Step by Step Solution

1. Step 1: Write the proportion equation
   156,138 : 335,956.50 = 335,956.50 : x
2. Step 2: Convert to fraction form
   156,138/335,956.50 = 335,956.50/x
3. Step 3: Cross multiply
   156,138x = 335,956.50 × 335,956.50
4. Step 4: Simplify right side
   156,138x = 112,866,769,892.25
5. Step 5: Solve for x
   x = 112,866,769,892.25/156,138
6. Step 6: Final answer
   x = 722,865.48