Finding the Fourth Proportional to 65,787.31, 90,781 and 37,105.39

Step by Step Solution

1. Step 1: Write the proportion equation
   65,787.31 : 90,781 = 37,105.39 : x
2. Step 2: Convert to fraction form
   65,787.31/90,781 = 37,105.39/x
3. Step 3: Cross multiply
   65,787.31x = 90,781 × 37,105.39
4. Step 4: Simplify right side
   65,787.31x = 3,368,464,409.59
5. Step 5: Solve for x
   x = 3,368,464,409.59/65,787.31
6. Step 6: Final answer
   x = 51,202.34