Finding the Fourth Proportional to 28,108.82, 42,176.90 and 13,300.10

Step by Step Solution

1. Step 1: Write the proportion equation
   28,108.82 : 42,176.90 = 13,300.10 : x
2. Step 2: Convert to fraction form
   28,108.82/42,176.90 = 13,300.10/x
3. Step 3: Cross multiply
   28,108.82x = 42,176.90 × 13,300.10
4. Step 4: Simplify right side
   28,108.82x = 560,956,968.22
5. Step 5: Solve for x
   x = 560,956,968.22/28,108.82
6. Step 6: Final answer
   x = 19,956.62