Finding the Third Proportional to 30,259.13 and 64,672.88

Step by Step Solution

1. Step 1: Write the proportion equation
   30,259.13 : 64,672.88 = 64,672.88 : x
2. Step 2: Convert to fraction form
   30,259.13/64,672.88 = 64,672.88/x
3. Step 3: Cross multiply
   30,259.13x = 64,672.88 × 64,672.88
4. Step 4: Simplify right side
   30,259.13x = 4,182,580,760.77
5. Step 5: Solve for x
   x = 4,182,580,760.77/30,259.13
6. Step 6: Final answer
   x = 138,225.44