Finding the Third Proportional to 219,132 and 292,612.50

Step by Step Solution

1. Step 1: Write the proportion equation
   219,132 : 292,612.50 = 292,612.50 : x
2. Step 2: Convert to fraction form
   219,132/292,612.50 = 292,612.50/x
3. Step 3: Cross multiply
   219,132x = 292,612.50 × 292,612.50
4. Step 4: Simplify right side
   219,132x = 85,622,075,156.25
5. Step 5: Solve for x
   x = 85,622,075,156.25/219,132
6. Step 6: Final answer
   x = 390,732.87