Finding the Fourth Proportional to 36,139.83, 49,869.98 and 21,603.69

Step by Step Solution

1. Step 1: Write the proportion equation
   36,139.83 : 49,869.98 = 21,603.69 : x
2. Step 2: Convert to fraction form
   36,139.83/49,869.98 = 21,603.69/x
3. Step 3: Cross multiply
   36,139.83x = 49,869.98 × 21,603.69
4. Step 4: Simplify right side
   36,139.83x = 1,077,375,420.96
5. Step 5: Solve for x
   x = 1,077,375,420.96/36,139.83
6. Step 6: Final answer
   x = 29,811.30