Finding the Fourth Proportional to 57,087.56, 78,732.42 and 34,421.60

Step by Step Solution

1. Step 1: Write the proportion equation
   57,087.56 : 78,732.42 = 34,421.60 : x
2. Step 2: Convert to fraction form
   57,087.56/78,732.42 = 34,421.60/x
3. Step 3: Cross multiply
   57,087.56x = 78,732.42 × 34,421.60
4. Step 4: Simplify right side
   57,087.56x = 2,710,095,868.27
5. Step 5: Solve for x
   x = 2,710,095,868.27/57,087.56
6. Step 6: Final answer
   x = 47,472.62