Finding the Fourth Proportional to 42,803.20, 64,216.61 and 17,854.98

Step by Step Solution

1. Step 1: Write the proportion equation
   42,803.20 : 64,216.61 = 17,854.98 : x
2. Step 2: Convert to fraction form
   42,803.20/64,216.61 = 17,854.98/x
3. Step 3: Cross multiply
   42,803.20x = 64,216.61 × 17,854.98
4. Step 4: Simplify right side
   42,803.20x = 1,146,586,287.22
5. Step 5: Solve for x
   x = 1,146,586,287.22/42,803.20
6. Step 6: Final answer
   x = 26,787.40