Finding the Third Proportional to 139,147.13 and 297,970.50

Step by Step Solution

1. Step 1: Write the proportion equation
   139,147.13 : 297,970.50 = 297,970.50 : x
2. Step 2: Convert to fraction form
   139,147.13/297,970.50 = 297,970.50/x
3. Step 3: Cross multiply
   139,147.13x = 297,970.50 × 297,970.50
4. Step 4: Simplify right side
   139,147.13x = 88,786,418,870.25
5. Step 5: Solve for x
   x = 88,786,418,870.25/139,147.13
6. Step 6: Final answer
   x = 638,075.84