Finding the Fourth Proportional to 28,225.71, 42,338.52 and 7,165.83

Step by Step Solution

1. Step 1: Write the proportion equation
   28,225.71 : 42,338.52 = 7,165.83 : x
2. Step 2: Convert to fraction form
   28,225.71/42,338.52 = 7,165.83/x
3. Step 3: Cross multiply
   28,225.71x = 42,338.52 × 7,165.83
4. Step 4: Simplify right side
   28,225.71x = 303,390,636.77
5. Step 5: Solve for x
   x = 303,390,636.77/28,225.71
6. Step 6: Final answer
   x = 10,748.73