Finding the Fourth Proportional to 83,420.16, 115,122.04 and 47,118.72

Step by Step Solution

1. Step 1: Write the proportion equation
   83,420.16 : 115,122.04 = 47,118.72 : x
2. Step 2: Convert to fraction form
   83,420.16/115,122.04 = 47,118.72/x
3. Step 3: Cross multiply
   83,420.16x = 115,122.04 × 47,118.72
4. Step 4: Simplify right side
   83,420.16x = 5,424,403,168.59
5. Step 5: Solve for x
   x = 5,424,403,168.59/83,420.16
6. Step 6: Final answer
   x = 65,025.09