Finding the Third Proportional to 71,139 and 148,813.50

Step by Step Solution

1. Step 1: Write the proportion equation
   71,139 : 148,813.50 = 148,813.50 : x
2. Step 2: Convert to fraction form
   71,139/148,813.50 = 148,813.50/x
3. Step 3: Cross multiply
   71,139x = 148,813.50 × 148,813.50
4. Step 4: Simplify right side
   71,139x = 22,145,457,782.25
5. Step 5: Solve for x
   x = 22,145,457,782.25/71,139
6. Step 6: Final answer
   x = 311,298.41