Finding the Fourth Proportional to 42,843.98, 64,305.40 and 21,798.74

Step by Step Solution

1. Step 1: Write the proportion equation
   42,843.98 : 64,305.40 = 21,798.74 : x
2. Step 2: Convert to fraction form
   42,843.98/64,305.40 = 21,798.74/x
3. Step 3: Cross multiply
   42,843.98x = 64,305.40 × 21,798.74
4. Step 4: Simplify right side
   42,843.98x = 1,401,776,695.20
5. Step 5: Solve for x
   x = 1,401,776,695.20/42,843.98
6. Step 6: Final answer
   x = 32,718.17