Finding the Third Proportional to 156,468 and 212,548.50

Step by Step Solution

1. Step 1: Write the proportion equation
   156,468 : 212,548.50 = 212,548.50 : x
2. Step 2: Convert to fraction form
   156,468/212,548.50 = 212,548.50/x
3. Step 3: Cross multiply
   156,468x = 212,548.50 × 212,548.50
4. Step 4: Simplify right side
   156,468x = 45,176,864,852.25
5. Step 5: Solve for x
   x = 45,176,864,852.25/156,468
6. Step 6: Final answer
   x = 288,729.10