Finding the Fourth Proportional to 13,858.32, 19,124.50 and 7,889.99

Step by Step Solution

1. Step 1: Write the proportion equation
   13,858.32 : 19,124.50 = 7,889.99 : x
2. Step 2: Convert to fraction form
   13,858.32/19,124.50 = 7,889.99/x
3. Step 3: Cross multiply
   13,858.32x = 19,124.50 × 7,889.99
4. Step 4: Simplify right side
   13,858.32x = 150,892,018.13
5. Step 5: Solve for x
   x = 150,892,018.13/13,858.32
6. Step 6: Final answer
   x = 10,888.19