Finding the Fourth Proportional to 28,141.48, 42,196.62 and 11,513.18

Step by Step Solution

1. Step 1: Write the proportion equation
   28,141.48 : 42,196.62 = 11,513.18 : x
2. Step 2: Convert to fraction form
   28,141.48/42,196.62 = 11,513.18/x
3. Step 3: Cross multiply
   28,141.48x = 42,196.62 × 11,513.18
4. Step 4: Simplify right side
   28,141.48x = 485,817,281.45
5. Step 5: Solve for x
   x = 485,817,281.45/28,141.48
6. Step 6: Final answer
   x = 17,263.39