Finding the Third Proportional to 139,402 and 296,785.50

Step by Step Solution

1. Step 1: Write the proportion equation
   139,402 : 296,785.50 = 296,785.50 : x
2. Step 2: Convert to fraction form
   139,402/296,785.50 = 296,785.50/x
3. Step 3: Cross multiply
   139,402x = 296,785.50 × 296,785.50
4. Step 4: Simplify right side
   139,402x = 88,081,633,010.25
5. Step 5: Solve for x
   x = 88,081,633,010.25/139,402
6. Step 6: Final answer
   x = 631,853.44