Finding the Third Proportional to 139,513.50 and 310,023

Step by Step Solution

1. Step 1: Write the proportion equation
   139,513.50 : 310,023 = 310,023 : x
2. Step 2: Convert to fraction form
   139,513.50/310,023 = 310,023/x
3. Step 3: Cross multiply
   139,513.50x = 310,023 × 310,023
4. Step 4: Simplify right side
   139,513.50x = 96,114,260,529
5. Step 5: Solve for x
   x = 96,114,260,529/139,513.50
6. Step 6: Final answer
   x = 688,924.44