Finding the Third Proportional to 139,053.75 and 297,790.50

Step by Step Solution

1. Step 1: Write the proportion equation
   139,053.75 : 297,790.50 = 297,790.50 : x
2. Step 2: Convert to fraction form
   139,053.75/297,790.50 = 297,790.50/x
3. Step 3: Cross multiply
   139,053.75x = 297,790.50 × 297,790.50
4. Step 4: Simplify right side
   139,053.75x = 88,679,181,890.25
5. Step 5: Solve for x
   x = 88,679,181,890.25/139,053.75
6. Step 6: Final answer
   x = 637,733.12