Finding the Fourth Proportional to 45,919.09, 68,870.55 and 12,631.12

Step by Step Solution

1. Step 1: Write the proportion equation
   45,919.09 : 68,870.55 = 12,631.12 : x
2. Step 2: Convert to fraction form
   45,919.09/68,870.55 = 12,631.12/x
3. Step 3: Cross multiply
   45,919.09x = 68,870.55 × 12,631.12
4. Step 4: Simplify right side
   45,919.09x = 869,912,181.52
5. Step 5: Solve for x
   x = 869,912,181.52/45,919.09
6. Step 6: Final answer
   x = 18,944.46