Finding the Third Proportional to 111,731.25 and 156,290.63

Step by Step Solution

1. Step 1: Write the proportion equation
   111,731.25 : 156,290.63 = 156,290.63 : x
2. Step 2: Convert to fraction form
   111,731.25/156,290.63 = 156,290.63/x
3. Step 3: Cross multiply
   111,731.25x = 156,290.63 × 156,290.63
4. Step 4: Simplify right side
   111,731.25x = 24,426,759,462.89
5. Step 5: Solve for x
   x = 24,426,759,462.89/111,731.25
6. Step 6: Final answer
   x = 218,620.66