Finding the Third Proportional to 55,495 and 121,128.50

Step by Step Solution

1. Step 1: Write the proportion equation
   55,495 : 121,128.50 = 121,128.50 : x
2. Step 2: Convert to fraction form
   55,495/121,128.50 = 121,128.50/x
3. Step 3: Cross multiply
   55,495x = 121,128.50 × 121,128.50
4. Step 4: Simplify right side
   55,495x = 14,672,113,512.25
5. Step 5: Solve for x
   x = 14,672,113,512.25/55,495
6. Step 6: Final answer
   x = 264,386.22