Finding the Fourth Proportional to 116,400.78, 174,389.73 and 89,789.58

Step by Step Solution

1. Step 1: Write the proportion equation
   116,400.78 : 174,389.73 = 89,789.58 : x
2. Step 2: Convert to fraction form
   116,400.78/174,389.73 = 89,789.58/x
3. Step 3: Cross multiply
   116,400.78x = 174,389.73 × 89,789.58
4. Step 4: Simplify right side
   116,400.78x = 15,658,380,613.01
5. Step 5: Solve for x
   x = 15,658,380,613.01/116,400.78
6. Step 6: Final answer
   x = 134,521.27