Finding the Fourth Proportional to 45,912.10, 68,738.55 and 45,912.10

Step by Step Solution

1. Step 1: Write the proportion equation
   45,912.10 : 68,738.55 = 45,912.10 : x
2. Step 2: Convert to fraction form
   45,912.10/68,738.55 = 45,912.10/x
3. Step 3: Cross multiply
   45,912.10x = 68,738.55 × 45,912.10
4. Step 4: Simplify right side
   45,912.10x = 3,155,931,181.46
5. Step 5: Solve for x
   x = 3,155,931,181.46/45,912.10
6. Step 6: Final answer
   x = 68,738.55