Finding the Third Proportional to 25,499.81 and 42,140.25

Step by Step Solution

1. Step 1: Write the proportion equation
   25,499.81 : 42,140.25 = 42,140.25 : x
2. Step 2: Convert to fraction form
   25,499.81/42,140.25 = 42,140.25/x
3. Step 3: Cross multiply
   25,499.81x = 42,140.25 × 42,140.25
4. Step 4: Simplify right side
   25,499.81x = 1,775,800,670.06
5. Step 5: Solve for x
   x = 1,775,800,670.06/25,499.81
6. Step 6: Final answer
   x = 69,639.75