Finding the Fourth Proportional to 35,989.59, 54,000.78 and 18,471.72

Step by Step Solution

1. Step 1: Write the proportion equation
   35,989.59 : 54,000.78 = 18,471.72 : x
2. Step 2: Convert to fraction form
   35,989.59/54,000.78 = 18,471.72/x
3. Step 3: Cross multiply
   35,989.59x = 54,000.78 × 18,471.72
4. Step 4: Simplify right side
   35,989.59x = 997,487,287.94
5. Step 5: Solve for x
   x = 997,487,287.94/35,989.59
6. Step 6: Final answer
   x = 27,715.99