Finding the Fourth Proportional to 28,098.93, 42,147.42 and 7,039.15

Step by Step Solution

1. Step 1: Write the proportion equation
   28,098.93 : 42,147.42 = 7,039.15 : x
2. Step 2: Convert to fraction form
   28,098.93/42,147.42 = 7,039.15/x
3. Step 3: Cross multiply
   28,098.93x = 42,147.42 × 7,039.15
4. Step 4: Simplify right side
   28,098.93x = 296,682,011.49
5. Step 5: Solve for x
   x = 296,682,011.49/28,098.93
6. Step 6: Final answer
   x = 10,558.48