Finding the Fourth Proportional to 66,150.78, 91,290.15 and 37,854.78

Step by Step Solution

1. Step 1: Write the proportion equation
   66,150.78 : 91,290.15 = 37,854.78 : x
2. Step 2: Convert to fraction form
   66,150.78/91,290.15 = 37,854.78/x
3. Step 3: Cross multiply
   66,150.78x = 91,290.15 × 37,854.78
4. Step 4: Simplify right side
   66,150.78x = 3,455,768,544.42
5. Step 5: Solve for x
   x = 3,455,768,544.42/66,150.78
6. Step 6: Final answer
   x = 52,240.78