Finding the Fourth Proportional to 19,128.29, 28,694.10 and 5,980.73

Step by Step Solution

1. Step 1: Write the proportion equation
   19,128.29 : 28,694.10 = 5,980.73 : x
2. Step 2: Convert to fraction form
   19,128.29/28,694.10 = 5,980.73/x
3. Step 3: Cross multiply
   19,128.29x = 28,694.10 × 5,980.73
4. Step 4: Simplify right side
   19,128.29x = 171,611,664.69
5. Step 5: Solve for x
   x = 171,611,664.69/19,128.29
6. Step 6: Final answer
   x = 8,971.62