Finding the Fourth Proportional to 67,830.89, 93,612.31 and 39,538.40

Step by Step Solution

1. Step 1: Write the proportion equation
   67,830.89 : 93,612.31 = 39,538.40 : x
2. Step 2: Convert to fraction form
   67,830.89/93,612.31 = 39,538.40/x
3. Step 3: Cross multiply
   67,830.89x = 93,612.31 × 39,538.40
4. Step 4: Simplify right side
   67,830.89x = 3,701,280,390.80
5. Step 5: Solve for x
   x = 3,701,280,390.80/67,830.89
6. Step 6: Final answer
   x = 54,566.30