Finding the Fourth Proportional to 19,256.31, 28,888.52 and 10,940.18

Step by Step Solution

1. Step 1: Write the proportion equation
   19,256.31 : 28,888.52 = 10,940.18 : x
2. Step 2: Convert to fraction form
   19,256.31/28,888.52 = 10,940.18/x
3. Step 3: Cross multiply
   19,256.31x = 28,888.52 × 10,940.18
4. Step 4: Simplify right side
   19,256.31x = 316,045,409.59
5. Step 5: Solve for x
   x = 316,045,409.59/19,256.31
6. Step 6: Final answer
   x = 16,412.56