Finding the Fourth Proportional to 93,109.54, 128,480.72 and 54,866.60

Step by Step Solution

1. Step 1: Write the proportion equation
   93,109.54 : 128,480.72 = 54,866.60 : x
2. Step 2: Convert to fraction form
   93,109.54/128,480.72 = 54,866.60/x
3. Step 3: Cross multiply
   93,109.54x = 128,480.72 × 54,866.60
4. Step 4: Simplify right side
   93,109.54x = 7,049,300,271.95
5. Step 5: Solve for x
   x = 7,049,300,271.95/93,109.54
6. Step 6: Final answer
   x = 75,709.75