Finding the Fourth Proportional to 28,051.16, 42,048.30 and 18,196.72

Step by Step Solution

1. Step 1: Write the proportion equation
   28,051.16 : 42,048.30 = 18,196.72 : x
2. Step 2: Convert to fraction form
   28,051.16/42,048.30 = 18,196.72/x
3. Step 3: Cross multiply
   28,051.16x = 42,048.30 × 18,196.72
4. Step 4: Simplify right side
   28,051.16x = 765,141,141.58
5. Step 5: Solve for x
   x = 765,141,141.58/28,051.16
6. Step 6: Final answer
   x = 27,276.63