Finding the Third Proportional to 56,499.19 and 121,648.50

Step by Step Solution

1. Step 1: Write the proportion equation
   56,499.19 : 121,648.50 = 121,648.50 : x
2. Step 2: Convert to fraction form
   56,499.19/121,648.50 = 121,648.50/x
3. Step 3: Cross multiply
   56,499.19x = 121,648.50 × 121,648.50
4. Step 4: Simplify right side
   56,499.19x = 14,798,357,552.25
5. Step 5: Solve for x
   x = 14,798,357,552.25/56,499.19
6. Step 6: Final answer
   x = 261,921.60