Finding the Fourth Proportional to 143,892.73, 215,716.01 and 55,209.88

Step by Step Solution

1. Step 1: Write the proportion equation
   143,892.73 : 215,716.01 = 55,209.88 : x
2. Step 2: Convert to fraction form
   143,892.73/215,716.01 = 55,209.88/x
3. Step 3: Cross multiply
   143,892.73x = 215,716.01 × 55,209.88
4. Step 4: Simplify right side
   143,892.73x = 11,909,653,947.60
5. Step 5: Solve for x
   x = 11,909,653,947.60/143,892.73
6. Step 6: Final answer
   x = 82,767.59