Finding the Fourth Proportional to 85,218.72, 117,602.28 and 49,429.92

Step by Step Solution

1. Step 1: Write the proportion equation
   85,218.72 : 117,602.28 = 49,429.92 : x
2. Step 2: Convert to fraction form
   85,218.72/117,602.28 = 49,429.92/x
3. Step 3: Cross multiply
   85,218.72x = 117,602.28 × 49,429.92
4. Step 4: Simplify right side
   85,218.72x = 5,813,071,292.22
5. Step 5: Solve for x
   x = 5,813,071,292.22/85,218.72
6. Step 6: Final answer
   x = 68,213.55