Finding the Fourth Proportional to 55,431.52, 83,146.84 and 13,878.52

Step by Step Solution

1. Step 1: Write the proportion equation
   55,431.52 : 83,146.84 = 13,878.52 : x
2. Step 2: Convert to fraction form
   55,431.52/83,146.84 = 13,878.52/x
3. Step 3: Cross multiply
   55,431.52x = 83,146.84 × 13,878.52
4. Step 4: Simplify right side
   55,431.52x = 1,153,955,081.88
5. Step 5: Solve for x
   x = 1,153,955,081.88/55,431.52
6. Step 6: Final answer
   x = 20,817.67