Finding the Fourth Proportional to 13,878.09, 19,151.78 and 7,590.47

Step by Step Solution

1. Step 1: Write the proportion equation
   13,878.09 : 19,151.78 = 7,590.47 : x
2. Step 2: Convert to fraction form
   13,878.09/19,151.78 = 7,590.47/x
3. Step 3: Cross multiply
   13,878.09x = 19,151.78 × 7,590.47
4. Step 4: Simplify right side
   13,878.09x = 145,370,877.83
5. Step 5: Solve for x
   x = 145,370,877.83/13,878.09
6. Step 6: Final answer
   x = 10,474.85