Finding the Fourth Proportional to 67,779, 93,538.20 and 40,920.90

Step by Step Solution

1. Step 1: Write the proportion equation
   67,779 : 93,538.20 = 40,920.90 : x
2. Step 2: Convert to fraction form
   67,779/93,538.20 = 40,920.90/x
3. Step 3: Cross multiply
   67,779x = 93,538.20 × 40,920.90
4. Step 4: Simplify right side
   67,779x = 3,827,667,328.38
5. Step 5: Solve for x
   x = 3,827,667,328.38/67,779
6. Step 6: Final answer
   x = 56,472.76