Finding the Fourth Proportional to 13,870.17, 19,139.13 and 7,901.10

Step by Step Solution

1. Step 1: Write the proportion equation
   13,870.17 : 19,139.13 = 7,901.10 : x
2. Step 2: Convert to fraction form
   13,870.17/19,139.13 = 7,901.10/x
3. Step 3: Cross multiply
   13,870.17x = 19,139.13 × 7,901.10
4. Step 4: Simplify right side
   13,870.17x = 151,220,180.04
5. Step 5: Solve for x
   x = 151,220,180.04/13,870.17
6. Step 6: Final answer
   x = 10,902.55