Finding the Fourth Proportional to 13,870.48, 19,141.32 and 7,902.40

Step by Step Solution

1. Step 1: Write the proportion equation
   13,870.48 : 19,141.32 = 7,902.40 : x
2. Step 2: Convert to fraction form
   13,870.48/19,141.32 = 7,902.40/x
3. Step 3: Cross multiply
   13,870.48x = 19,141.32 × 7,902.40
4. Step 4: Simplify right side
   13,870.48x = 151,262,367.17
5. Step 5: Solve for x
   x = 151,262,367.17/13,870.48
6. Step 6: Final answer
   x = 10,905.34