Finding the Fourth Proportional to 10,105.51, 15,146.93 and 3,435.78

Step by Step Solution

1. Step 1: Write the proportion equation
   10,105.51 : 15,146.93 = 3,435.78 : x
2. Step 2: Convert to fraction form
   10,105.51/15,146.93 = 3,435.78/x
3. Step 3: Cross multiply
   10,105.51x = 15,146.93 × 3,435.78
4. Step 4: Simplify right side
   10,105.51x = 52,041,519.16
5. Step 5: Solve for x
   x = 52,041,519.16/10,105.51
6. Step 6: Final answer
   x = 5,149.82