Finding the Third Proportional to 42,280.13 and 66,898.88

Step by Step Solution

1. Step 1: Write the proportion equation
   42,280.13 : 66,898.88 = 66,898.88 : x
2. Step 2: Convert to fraction form
   42,280.13/66,898.88 = 66,898.88/x
3. Step 3: Cross multiply
   42,280.13x = 66,898.88 × 66,898.88
4. Step 4: Simplify right side
   42,280.13x = 4,475,459,476.27
5. Step 5: Solve for x
   x = 4,475,459,476.27/42,280.13
6. Step 6: Final answer
   x = 105,852.56