Finding the Fourth Proportional to 13,907.10, 19,191.86 and 7,619.47

Step by Step Solution

1. Step 1: Write the proportion equation
   13,907.10 : 19,191.86 = 7,619.47 : x
2. Step 2: Convert to fraction form
   13,907.10/19,191.86 = 7,619.47/x
3. Step 3: Cross multiply
   13,907.10x = 19,191.86 × 7,619.47
4. Step 4: Simplify right side
   13,907.10x = 146,231,801.51
5. Step 5: Solve for x
   x = 146,231,801.51/13,907.10
6. Step 6: Final answer
   x = 10,514.90