Finding the Third Proportional to 139,140.75 and 297,960

Step by Step Solution

1. Step 1: Write the proportion equation
   139,140.75 : 297,960 = 297,960 : x
2. Step 2: Convert to fraction form
   139,140.75/297,960 = 297,960/x
3. Step 3: Cross multiply
   139,140.75x = 297,960 × 297,960
4. Step 4: Simplify right side
   139,140.75x = 88,780,161,600
5. Step 5: Solve for x
   x = 88,780,161,600/139,140.75
6. Step 6: Final answer
   x = 638,060.11