Finding the Fourth Proportional to 78,558.94, 108,538.32 and 54,791.74

Step by Step Solution

1. Step 1: Write the proportion equation
   78,558.94 : 108,538.32 = 54,791.74 : x
2. Step 2: Convert to fraction form
   78,558.94/108,538.32 = 54,791.74/x
3. Step 3: Cross multiply
   78,558.94x = 108,538.32 × 54,791.74
4. Step 4: Simplify right side
   78,558.94x = 5,947,003,409.48
5. Step 5: Solve for x
   x = 5,947,003,409.48/78,558.94
6. Step 6: Final answer
   x = 75,701.17