Finding the Fourth Proportional to 42,678.90, 64,016.46 and 14,601.42

Step by Step Solution

1. Step 1: Write the proportion equation
   42,678.90 : 64,016.46 = 14,601.42 : x
2. Step 2: Convert to fraction form
   42,678.90/64,016.46 = 14,601.42/x
3. Step 3: Cross multiply
   42,678.90x = 64,016.46 × 14,601.42
4. Step 4: Simplify right side
   42,678.90x = 934,731,219.37
5. Step 5: Solve for x
   x = 934,731,219.37/42,678.90
6. Step 6: Final answer
   x = 21,901.48