Finding the Fourth Proportional to 28,196.28, 42,285.78 and 7,417.08

Step by Step Solution

1. Step 1: Write the proportion equation
   28,196.28 : 42,285.78 = 7,417.08 : x
2. Step 2: Convert to fraction form
   28,196.28/42,285.78 = 7,417.08/x
3. Step 3: Cross multiply
   28,196.28x = 42,285.78 × 7,417.08
4. Step 4: Simplify right side
   28,196.28x = 313,637,013.12
5. Step 5: Solve for x
   x = 313,637,013.12/28,196.28
6. Step 6: Final answer
   x = 11,123.35