Finding the Fourth Proportional to 65,511.15, 90,405.69 and 37,218.39

Step by Step Solution

1. Step 1: Write the proportion equation
   65,511.15 : 90,405.69 = 37,218.39 : x
2. Step 2: Convert to fraction form
   65,511.15/90,405.69 = 37,218.39/x
3. Step 3: Cross multiply
   65,511.15x = 90,405.69 × 37,218.39
4. Step 4: Simplify right side
   65,511.15x = 3,364,753,590.52
5. Step 5: Solve for x
   x = 3,364,753,590.52/65,511.15
6. Step 6: Final answer
   x = 51,361.54