Finding the Third Proportional to 56,146.50 and 122,859

Step by Step Solution

1. Step 1: Write the proportion equation
   56,146.50 : 122,859 = 122,859 : x
2. Step 2: Convert to fraction form
   56,146.50/122,859 = 122,859/x
3. Step 3: Cross multiply
   56,146.50x = 122,859 × 122,859
4. Step 4: Simplify right side
   56,146.50x = 15,094,333,881
5. Step 5: Solve for x
   x = 15,094,333,881/56,146.50
6. Step 6: Final answer
   x = 268,838.38