Finding the Fourth Proportional to 42,146.34, 63,236.52 and 18,756.78

Step by Step Solution

1. Step 1: Write the proportion equation
   42,146.34 : 63,236.52 = 18,756.78 : x
2. Step 2: Convert to fraction form
   42,146.34/63,236.52 = 18,756.78/x
3. Step 3: Cross multiply
   42,146.34x = 63,236.52 × 18,756.78
4. Step 4: Simplify right side
   42,146.34x = 1,186,113,493.61
5. Step 5: Solve for x
   x = 1,186,113,493.61/42,146.34
6. Step 6: Final answer
   x = 28,142.74