Finding the Third Proportional to 42,604.88 and 66,838.50

Step by Step Solution

1. Step 1: Write the proportion equation
   42,604.88 : 66,838.50 = 66,838.50 : x
2. Step 2: Convert to fraction form
   42,604.88/66,838.50 = 66,838.50/x
3. Step 3: Cross multiply
   42,604.88x = 66,838.50 × 66,838.50
4. Step 4: Simplify right side
   42,604.88x = 4,467,385,082.25
5. Step 5: Solve for x
   x = 4,467,385,082.25/42,604.88
6. Step 6: Final answer
   x = 104,856.20