Finding the Fourth Proportional to 66,608.42, 91,915.20 and 37,931

Step by Step Solution

1. Step 1: Write the proportion equation
   66,608.42 : 91,915.20 = 37,931 : x
2. Step 2: Convert to fraction form
   66,608.42/91,915.20 = 37,931/x
3. Step 3: Cross multiply
   66,608.42x = 91,915.20 × 37,931
4. Step 4: Simplify right side
   66,608.42x = 3,486,435,451.20
5. Step 5: Solve for x
   x = 3,486,435,451.20/66,608.42
6. Step 6: Final answer
   x = 52,342.26