Finding the Third Proportional to 156,321 and 242,203.50

Step by Step Solution

1. Step 1: Write the proportion equation
   156,321 : 242,203.50 = 242,203.50 : x
2. Step 2: Convert to fraction form
   156,321/242,203.50 = 242,203.50/x
3. Step 3: Cross multiply
   156,321x = 242,203.50 × 242,203.50
4. Step 4: Simplify right side
   156,321x = 58,662,535,412.25
5. Step 5: Solve for x
   x = 58,662,535,412.25/156,321
6. Step 6: Final answer
   x = 375,269.70