Finding the Fourth Proportional to 85,941.69, 118,621.32 and 58,728.78

Step by Step Solution

1. Step 1: Write the proportion equation
   85,941.69 : 118,621.32 = 58,728.78 : x
2. Step 2: Convert to fraction form
   85,941.69/118,621.32 = 58,728.78/x
3. Step 3: Cross multiply
   85,941.69x = 118,621.32 × 58,728.78
4. Step 4: Simplify right side
   85,941.69x = 6,966,485,405.59
5. Step 5: Solve for x
   x = 6,966,485,405.59/85,941.69
6. Step 6: Final answer
   x = 81,060.61