Finding the Fourth Proportional to 42,089.31, 63,085.56 and 18,391.34

Step by Step Solution

1. Step 1: Write the proportion equation
   42,089.31 : 63,085.56 = 18,391.34 : x
2. Step 2: Convert to fraction form
   42,089.31/63,085.56 = 18,391.34/x
3. Step 3: Cross multiply
   42,089.31x = 63,085.56 × 18,391.34
4. Step 4: Simplify right side
   42,089.31x = 1,160,227,983.05
5. Step 5: Solve for x
   x = 1,160,227,983.05/42,089.31
6. Step 6: Final answer
   x = 27,565.86