Finding the Third Proportional to 42,928.31 and 65,670.75

Step by Step Solution

1. Step 1: Write the proportion equation
   42,928.31 : 65,670.75 = 65,670.75 : x
2. Step 2: Convert to fraction form
   42,928.31/65,670.75 = 65,670.75/x
3. Step 3: Cross multiply
   42,928.31x = 65,670.75 × 65,670.75
4. Step 4: Simplify right side
   42,928.31x = 4,312,647,405.56
5. Step 5: Solve for x
   x = 4,312,647,405.56/42,928.31
6. Step 6: Final answer
   x = 100,461.61