Finding the Fourth Proportional to 28,152.68, 42,196.82 and 13,340.61

Step by Step Solution

1. Step 1: Write the proportion equation
   28,152.68 : 42,196.82 = 13,340.61 : x
2. Step 2: Convert to fraction form
   28,152.68/42,196.82 = 13,340.61/x
3. Step 3: Cross multiply
   28,152.68x = 42,196.82 × 13,340.61
4. Step 4: Simplify right side
   28,152.68x = 562,931,252.16
5. Step 5: Solve for x
   x = 562,931,252.16/28,152.68
6. Step 6: Final answer
   x = 19,995.66