Finding the Third Proportional to 377,721 and 528,061.50

Step by Step Solution

1. Step 1: Write the proportion equation
   377,721 : 528,061.50 = 528,061.50 : x
2. Step 2: Convert to fraction form
   377,721/528,061.50 = 528,061.50/x
3. Step 3: Cross multiply
   377,721x = 528,061.50 × 528,061.50
4. Step 4: Simplify right side
   377,721x = 278,848,947,782.25
5. Step 5: Solve for x
   x = 278,848,947,782.25/377,721
6. Step 6: Final answer
   x = 738,240.52