Finding the Fourth Proportional to 112,897.56, 155,763.18 and 65,144.64

Step by Step Solution

1. Step 1: Write the proportion equation
   112,897.56 : 155,763.18 = 65,144.64 : x
2. Step 2: Convert to fraction form
   112,897.56/155,763.18 = 65,144.64/x
3. Step 3: Cross multiply
   112,897.56x = 155,763.18 × 65,144.64
4. Step 4: Simplify right side
   112,897.56x = 10,147,136,286.36
5. Step 5: Solve for x
   x = 10,147,136,286.36/112,897.56
6. Step 6: Final answer
   x = 89,879.15