Finding the Third Proportional to 72,307.50 and 148,138.50

Step by Step Solution

1. Step 1: Write the proportion equation
   72,307.50 : 148,138.50 = 148,138.50 : x
2. Step 2: Convert to fraction form
   72,307.50/148,138.50 = 148,138.50/x
3. Step 3: Cross multiply
   72,307.50x = 148,138.50 × 148,138.50
4. Step 4: Simplify right side
   72,307.50x = 21,945,015,182.25
5. Step 5: Solve for x
   x = 21,945,015,182.25/72,307.50
6. Step 6: Final answer
   x = 303,495.70