Finding the Fourth Proportional to 13,870.36, 19,145.10 and 7,905.25

Step by Step Solution

1. Step 1: Write the proportion equation
   13,870.36 : 19,145.10 = 7,905.25 : x
2. Step 2: Convert to fraction form
   13,870.36/19,145.10 = 7,905.25/x
3. Step 3: Cross multiply
   13,870.36x = 19,145.10 × 7,905.25
4. Step 4: Simplify right side
   13,870.36x = 151,346,801.78
5. Step 5: Solve for x
   x = 151,346,801.78/13,870.36
6. Step 6: Final answer
   x = 10,911.53