Finding the Fourth Proportional to 112,775.40, 155,646.63 and 65,019.42

Step by Step Solution

1. Step 1: Write the proportion equation
   112,775.40 : 155,646.63 = 65,019.42 : x
2. Step 2: Convert to fraction form
   112,775.40/155,646.63 = 65,019.42/x
3. Step 3: Cross multiply
   112,775.40x = 155,646.63 × 65,019.42
4. Step 4: Simplify right side
   112,775.40x = 10,120,053,607.55
5. Step 5: Solve for x
   x = 10,120,053,607.55/112,775.40
6. Step 6: Final answer
   x = 89,736.36