Finding the Third Proportional to 139,400.25 and 296,782.50

Step by Step Solution

1. Step 1: Write the proportion equation
   139,400.25 : 296,782.50 = 296,782.50 : x
2. Step 2: Convert to fraction form
   139,400.25/296,782.50 = 296,782.50/x
3. Step 3: Cross multiply
   139,400.25x = 296,782.50 × 296,782.50
4. Step 4: Simplify right side
   139,400.25x = 88,079,852,306.25
5. Step 5: Solve for x
   x = 88,079,852,306.25/139,400.25
6. Step 6: Final answer
   x = 631,848.60