Finding the Fourth Proportional to 42,681.17, 64,060.49 and 21,635.85

Step by Step Solution

1. Step 1: Write the proportion equation
   42,681.17 : 64,060.49 = 21,635.85 : x
2. Step 2: Convert to fraction form
   42,681.17/64,060.49 = 21,635.85/x
3. Step 3: Cross multiply
   42,681.17x = 64,060.49 × 21,635.85
4. Step 4: Simplify right side
   42,681.17x = 1,386,003,044.39
5. Step 5: Solve for x
   x = 1,386,003,044.39/42,681.17
6. Step 6: Final answer
   x = 32,473.41