Finding the Fourth Proportional to 28,047.78, 42,108.42 and 19,731.71

Step by Step Solution

1. Step 1: Write the proportion equation
   28,047.78 : 42,108.42 = 19,731.71 : x
2. Step 2: Convert to fraction form
   28,047.78/42,108.42 = 19,731.71/x
3. Step 3: Cross multiply
   28,047.78x = 42,108.42 × 19,731.71
4. Step 4: Simplify right side
   28,047.78x = 830,870,921.46
5. Step 5: Solve for x
   x = 830,870,921.46/28,047.78
6. Step 6: Final answer
   x = 29,623.41