Finding the Fourth Proportional to 28,101.89, 42,151.82 and 7,042.10

Step by Step Solution

1. Step 1: Write the proportion equation
   28,101.89 : 42,151.82 = 7,042.10 : x
2. Step 2: Convert to fraction form
   28,101.89/42,151.82 = 7,042.10/x
3. Step 3: Cross multiply
   28,101.89x = 42,151.82 × 7,042.10
4. Step 4: Simplify right side
   28,101.89x = 296,837,085.65
5. Step 5: Solve for x
   x = 296,837,085.65/28,101.89
6. Step 6: Final answer
   x = 10,562.89