Finding the Third Proportional to 139,099.50 and 297,877.50

Step by Step Solution

1. Step 1: Write the proportion equation
   139,099.50 : 297,877.50 = 297,877.50 : x
2. Step 2: Convert to fraction form
   139,099.50/297,877.50 = 297,877.50/x
3. Step 3: Cross multiply
   139,099.50x = 297,877.50 × 297,877.50
4. Step 4: Simplify right side
   139,099.50x = 88,731,005,006.25
5. Step 5: Solve for x
   x = 88,731,005,006.25/139,099.50
6. Step 6: Final answer
   x = 637,895.93