Finding the Fourth Proportional to 83,667.85, 115,428.78 and 47,838.64

Step by Step Solution

1. Step 1: Write the proportion equation
   83,667.85 : 115,428.78 = 47,838.64 : x
2. Step 2: Convert to fraction form
   83,667.85/115,428.78 = 47,838.64/x
3. Step 3: Cross multiply
   83,667.85x = 115,428.78 × 47,838.64
4. Step 4: Simplify right side
   83,667.85x = 5,521,955,852.06
5. Step 5: Solve for x
   x = 5,521,955,852.06/83,667.85
6. Step 6: Final answer
   x = 65,998.54