Finding the Fourth Proportional to 53,918.55, 80,478.63 and 50,594.31

Step by Step Solution

1. Step 1: Write the proportion equation
   53,918.55 : 80,478.63 = 50,594.31 : x
2. Step 2: Convert to fraction form
   53,918.55/80,478.63 = 50,594.31/x
3. Step 3: Cross multiply
   53,918.55x = 80,478.63 × 50,594.31
4. Step 4: Simplify right side
   53,918.55x = 4,071,760,754.60
5. Step 5: Solve for x
   x = 4,071,760,754.60/53,918.55
6. Step 6: Final answer
   x = 75,516.88