Finding the Fourth Proportional to 55,410, 83,116.62 and 13,857

Step by Step Solution

1. Step 1: Write the proportion equation
   55,410 : 83,116.62 = 13,857 : x
2. Step 2: Convert to fraction form
   55,410/83,116.62 = 13,857/x
3. Step 3: Cross multiply
   55,410x = 83,116.62 × 13,857
4. Step 4: Simplify right side
   55,410x = 1,151,747,003.34
5. Step 5: Solve for x
   x = 1,151,747,003.34/55,410
6. Step 6: Final answer
   x = 20,785.91