Finding the Fourth Proportional to 28,487.42, 42,733.56 and 7,430.25

Step by Step Solution

1. Step 1: Write the proportion equation
   28,487.42 : 42,733.56 = 7,430.25 : x
2. Step 2: Convert to fraction form
   28,487.42/42,733.56 = 7,430.25/x
3. Step 3: Cross multiply
   28,487.42x = 42,733.56 × 7,430.25
4. Step 4: Simplify right side
   28,487.42x = 317,521,034.19
5. Step 5: Solve for x
   x = 317,521,034.19/28,487.42
6. Step 6: Final answer
   x = 11,146.01