Finding the Fourth Proportional to 121,080.72, 181,613.70 and 57,945.72

Step by Step Solution

1. Step 1: Write the proportion equation
   121,080.72 : 181,613.70 = 57,945.72 : x
2. Step 2: Convert to fraction form
   121,080.72/181,613.70 = 57,945.72/x
3. Step 3: Cross multiply
   121,080.72x = 181,613.70 × 57,945.72
4. Step 4: Simplify right side
   121,080.72x = 10,523,736,608.36
5. Step 5: Solve for x
   x = 10,523,736,608.36/121,080.72
6. Step 6: Final answer
   x = 86,915.05