Finding the Fourth Proportional to 66,114, 99,105.39 and 30,990.78

Step by Step Solution

1. Step 1: Write the proportion equation
   66,114 : 99,105.39 = 30,990.78 : x
2. Step 2: Convert to fraction form
   66,114/99,105.39 = 30,990.78/x
3. Step 3: Cross multiply
   66,114x = 99,105.39 × 30,990.78
4. Step 4: Simplify right side
   66,114x = 3,071,353,338.30
5. Step 5: Solve for x
   x = 3,071,353,338.30/66,114
6. Step 6: Final answer
   x = 46,455.42