Finding the Fourth Proportional to 28,141.47, 42,181.83 and 18,287.82

Step by Step Solution

1. Step 1: Write the proportion equation
   28,141.47 : 42,181.83 = 18,287.82 : x
2. Step 2: Convert to fraction form
   28,141.47/42,181.83 = 18,287.82/x
3. Step 3: Cross multiply
   28,141.47x = 42,181.83 × 18,287.82
4. Step 4: Simplify right side
   28,141.47x = 771,413,714.31
5. Step 5: Solve for x
   x = 771,413,714.31/28,141.47
6. Step 6: Final answer
   x = 27,411.99