Finding the Fourth Proportional to 143,838.48, 215,759.52 and 55,097.31

Step by Step Solution

1. Step 1: Write the proportion equation
   143,838.48 : 215,759.52 = 55,097.31 : x
2. Step 2: Convert to fraction form
   143,838.48/215,759.52 = 55,097.31/x
3. Step 3: Cross multiply
   143,838.48x = 215,759.52 × 55,097.31
4. Step 4: Simplify right side
   143,838.48x = 11,887,769,158.89
5. Step 5: Solve for x
   x = 11,887,769,158.89/143,838.48
6. Step 6: Final answer
   x = 82,646.65