Finding the Fourth Proportional to 35,449.78, 53,185.10 and 10,490.50

Step by Step Solution

1. Step 1: Write the proportion equation
   35,449.78 : 53,185.10 = 10,490.50 : x
2. Step 2: Convert to fraction form
   35,449.78/53,185.10 = 10,490.50/x
3. Step 3: Cross multiply
   35,449.78x = 53,185.10 × 10,490.50
4. Step 4: Simplify right side
   35,449.78x = 557,938,158.59
5. Step 5: Solve for x
   x = 557,938,158.59/35,449.78
6. Step 6: Final answer
   x = 15,738.83