Finding the Fourth Proportional to 56,981.73, 85,472.79 and 17,538.60

Step by Step Solution

1. Step 1: Write the proportion equation
   56,981.73 : 85,472.79 = 17,538.60 : x
2. Step 2: Convert to fraction form
   56,981.73/85,472.79 = 17,538.60/x
3. Step 3: Cross multiply
   56,981.73x = 85,472.79 × 17,538.60
4. Step 4: Simplify right side
   56,981.73x = 1,499,073,074.69
5. Step 5: Solve for x
   x = 1,499,073,074.69/56,981.73
6. Step 6: Final answer
   x = 26,307.96