Finding the Third Proportional to 111,873 and 156,415.50

Step by Step Solution

1. Step 1: Write the proportion equation
   111,873 : 156,415.50 = 156,415.50 : x
2. Step 2: Convert to fraction form
   111,873/156,415.50 = 156,415.50/x
3. Step 3: Cross multiply
   111,873x = 156,415.50 × 156,415.50
4. Step 4: Simplify right side
   111,873x = 24,465,808,640.25
5. Step 5: Solve for x
   x = 24,465,808,640.25/111,873
6. Step 6: Final answer
   x = 218,692.70