Finding the Fourth Proportional to 42,935.72, 64,400.31 and 21,862.58

Step by Step Solution

1. Step 1: Write the proportion equation
   42,935.72 : 64,400.31 = 21,862.58 : x
2. Step 2: Convert to fraction form
   42,935.72/64,400.31 = 21,862.58/x
3. Step 3: Cross multiply
   42,935.72x = 64,400.31 × 21,862.58
4. Step 4: Simplify right side
   42,935.72x = 1,407,956,607.40
5. Step 5: Solve for x
   x = 1,407,956,607.40/42,935.72
6. Step 6: Final answer
   x = 32,792.20