Finding the Fourth Proportional to 13,868.32, 19,136.06 and 7,900.10

Step by Step Solution

1. Step 1: Write the proportion equation
   13,868.32 : 19,136.06 = 7,900.10 : x
2. Step 2: Convert to fraction form
   13,868.32/19,136.06 = 7,900.10/x
3. Step 3: Cross multiply
   13,868.32x = 19,136.06 × 7,900.10
4. Step 4: Simplify right side
   13,868.32x = 151,176,807.36
5. Step 5: Solve for x
   x = 151,176,807.36/13,868.32
6. Step 6: Final answer
   x = 10,900.88