Finding the Fourth Proportional to 11,921.36, 17,875.86 and 4,900.10

Step by Step Solution

1. Step 1: Write the proportion equation
   11,921.36 : 17,875.86 = 4,900.10 : x
2. Step 2: Convert to fraction form
   11,921.36/17,875.86 = 4,900.10/x
3. Step 3: Cross multiply
   11,921.36x = 17,875.86 × 4,900.10
4. Step 4: Simplify right side
   11,921.36x = 87,593,501.59
5. Step 5: Solve for x
   x = 87,593,501.59/11,921.36
6. Step 6: Final answer
   x = 7,347.61