Finding the Fourth Proportional to 65,435.35, 90,277.78 and 42,787.59

Step by Step Solution

1. Step 1: Write the proportion equation
   65,435.35 : 90,277.78 = 42,787.59 : x
2. Step 2: Convert to fraction form
   65,435.35/90,277.78 = 42,787.59/x
3. Step 3: Cross multiply
   65,435.35x = 90,277.78 × 42,787.59
4. Step 4: Simplify right side
   65,435.35x = 3,862,768,422.81
5. Step 5: Solve for x
   x = 3,862,768,422.81/65,435.35
6. Step 6: Final answer
   x = 59,031.83