Finding the Fourth Proportional to 42,089.52, 63,141.56 and 18,717.76

Step by Step Solution

1. Step 1: Write the proportion equation
   42,089.52 : 63,141.56 = 18,717.76 : x
2. Step 2: Convert to fraction form
   42,089.52/63,141.56 = 18,717.76/x
3. Step 3: Cross multiply
   42,089.52x = 63,141.56 × 18,717.76
4. Step 4: Simplify right side
   42,089.52x = 1,181,868,566.11
5. Step 5: Solve for x
   x = 1,181,868,566.11/42,089.52
6. Step 6: Final answer
   x = 28,079.88