Finding the Fourth Proportional to 83,667.98, 115,421.28 and 55,397.36

Step by Step Solution

1. Step 1: Write the proportion equation
   83,667.98 : 115,421.28 = 55,397.36 : x
2. Step 2: Convert to fraction form
   83,667.98/115,421.28 = 55,397.36/x
3. Step 3: Cross multiply
   83,667.98x = 115,421.28 × 55,397.36
4. Step 4: Simplify right side
   83,667.98x = 6,394,034,199.82
5. Step 5: Solve for x
   x = 6,394,034,199.82/83,667.98
6. Step 6: Final answer
   x = 76,421.52