Finding the Fourth Proportional to 42,654.50, 63,981.70 and 18,956.53

Step by Step Solution

1. Step 1: Write the proportion equation
   42,654.50 : 63,981.70 = 18,956.53 : x
2. Step 2: Convert to fraction form
   42,654.50/63,981.70 = 18,956.53/x
3. Step 3: Cross multiply
   42,654.50x = 63,981.70 × 18,956.53
4. Step 4: Simplify right side
   42,654.50x = 1,212,870,808.16
5. Step 5: Solve for x
   x = 1,212,870,808.16/42,654.50
6. Step 6: Final answer
   x = 28,434.77