Finding the Fourth Proportional to 67,422.42, 93,020.13 and 39,117.78

Step by Step Solution

1. Step 1: Write the proportion equation
   67,422.42 : 93,020.13 = 39,117.78 : x
2. Step 2: Convert to fraction form
   67,422.42/93,020.13 = 39,117.78/x
3. Step 3: Cross multiply
   67,422.42x = 93,020.13 × 39,117.78
4. Step 4: Simplify right side
   67,422.42x = 3,638,740,980.91
5. Step 5: Solve for x
   x = 3,638,740,980.91/67,422.42
6. Step 6: Final answer
   x = 53,969.30