Finding the Fourth Proportional to 30,590.52, 42,238.78 and 19,840.50

Step by Step Solution

1. Step 1: Write the proportion equation
   30,590.52 : 42,238.78 = 19,840.50 : x
2. Step 2: Convert to fraction form
   30,590.52/42,238.78 = 19,840.50/x
3. Step 3: Cross multiply
   30,590.52x = 42,238.78 × 19,840.50
4. Step 4: Simplify right side
   30,590.52x = 838,038,514.59
5. Step 5: Solve for x
   x = 838,038,514.59/30,590.52
6. Step 6: Final answer
   x = 27,395.37