Finding the Fourth Proportional to 72,090.78, 108,059.62 and 42,522.54

Step by Step Solution

1. Step 1: Write the proportion equation
   72,090.78 : 108,059.62 = 42,522.54 : x
2. Step 2: Convert to fraction form
   72,090.78/108,059.62 = 42,522.54/x
3. Step 3: Cross multiply
   72,090.78x = 108,059.62 × 42,522.54
4. Step 4: Simplify right side
   72,090.78x = 4,594,969,513.83
5. Step 5: Solve for x
   x = 4,594,969,513.83/72,090.78
6. Step 6: Final answer
   x = 63,738.66