Finding the Fourth Proportional to 42,972.16, 64,285.94 and 35,591

Step by Step Solution

1. Step 1: Write the proportion equation
   42,972.16 : 64,285.94 = 35,591 : x
2. Step 2: Convert to fraction form
   42,972.16/64,285.94 = 35,591/x
3. Step 3: Cross multiply
   42,972.16x = 64,285.94 × 35,591
4. Step 4: Simplify right side
   42,972.16x = 2,288,000,890.54
5. Step 5: Solve for x
   x = 2,288,000,890.54/42,972.16
6. Step 6: Final answer
   x = 53,243.80