Finding the Fourth Proportional to 28,978.65, 43,462.83 and 13,179.98

Step by Step Solution

1. Step 1: Write the proportion equation
   28,978.65 : 43,462.83 = 13,179.98 : x
2. Step 2: Convert to fraction form
   28,978.65/43,462.83 = 13,179.98/x
3. Step 3: Cross multiply
   28,978.65x = 43,462.83 × 13,179.98
4. Step 4: Simplify right side
   28,978.65x = 572,839,230.14
5. Step 5: Solve for x
   x = 572,839,230.14/28,978.65
6. Step 6: Final answer
   x = 19,767.63