Finding the Fourth Proportional to 112,569.72, 155,331 and 64,177.89

Step by Step Solution

1. Step 1: Write the proportion equation
   112,569.72 : 155,331 = 64,177.89 : x
2. Step 2: Convert to fraction form
   112,569.72/155,331 = 64,177.89/x
3. Step 3: Cross multiply
   112,569.72x = 155,331 × 64,177.89
4. Step 4: Simplify right side
   112,569.72x = 9,968,815,831.59
5. Step 5: Solve for x
   x = 9,968,815,831.59/112,569.72
6. Step 6: Final answer
   x = 88,556.81