Finding the Fourth Proportional to 28,139.46, 42,162.46 and 19,802.04

Step by Step Solution

1. Step 1: Write the proportion equation
   28,139.46 : 42,162.46 = 19,802.04 : x
2. Step 2: Convert to fraction form
   28,139.46/42,162.46 = 19,802.04/x
3. Step 3: Cross multiply
   28,139.46x = 42,162.46 × 19,802.04
4. Step 4: Simplify right side
   28,139.46x = 834,902,719.42
5. Step 5: Solve for x
   x = 834,902,719.42/28,139.46
6. Step 6: Final answer
   x = 29,670.18