Finding the Fourth Proportional to 83,667.67, 115,420.85 and 55,397.05

Step by Step Solution

1. Step 1: Write the proportion equation
   83,667.67 : 115,420.85 = 55,397.05 : x
2. Step 2: Convert to fraction form
   83,667.67/115,420.85 = 55,397.05/x
3. Step 3: Cross multiply
   83,667.67x = 115,420.85 × 55,397.05
4. Step 4: Simplify right side
   83,667.67x = 6,393,974,598.49
5. Step 5: Solve for x
   x = 6,393,974,598.49/83,667.67
6. Step 6: Final answer
   x = 76,421.09