Finding the Fourth Proportional to 83,628.79, 115,407.69 and 47,329.57

Step by Step Solution

1. Step 1: Write the proportion equation
   83,628.79 : 115,407.69 = 47,329.57 : x
2. Step 2: Convert to fraction form
   83,628.79/115,407.69 = 47,329.57/x
3. Step 3: Cross multiply
   83,628.79x = 115,407.69 × 47,329.57
4. Step 4: Simplify right side
   83,628.79x = 5,462,196,309.17
5. Step 5: Solve for x
   x = 5,462,196,309.17/83,628.79
6. Step 6: Final answer
   x = 65,314.78