Finding the Fourth Proportional to 42,966.18, 64,393.59 and 23,990.31

Step by Step Solution

1. Step 1: Write the proportion equation
   42,966.18 : 64,393.59 = 23,990.31 : x
2. Step 2: Convert to fraction form
   42,966.18/64,393.59 = 23,990.31/x
3. Step 3: Cross multiply
   42,966.18x = 64,393.59 × 23,990.31
4. Step 4: Simplify right side
   42,966.18x = 1,544,822,186.11
5. Step 5: Solve for x
   x = 1,544,822,186.11/42,966.18
6. Step 6: Final answer
   x = 35,954.38