Finding the Fourth Proportional to 78,557.94, 108,536.94 and 54,790.74

Step by Step Solution

1. Step 1: Write the proportion equation
   78,557.94 : 108,536.94 = 54,790.74 : x
2. Step 2: Convert to fraction form
   78,557.94/108,536.94 = 54,790.74/x
3. Step 3: Cross multiply
   78,557.94x = 108,536.94 × 54,790.74
4. Step 4: Simplify right side
   78,557.94x = 5,946,819,259.94
5. Step 5: Solve for x
   x = 5,946,819,259.94/78,557.94
6. Step 6: Final answer
   x = 75,699.79