Finding the Fourth Proportional to 112,978.79, 155,924.55 and 65,232.05

Step by Step Solution

1. Step 1: Write the proportion equation
   112,978.79 : 155,924.55 = 65,232.05 : x
2. Step 2: Convert to fraction form
   112,978.79/155,924.55 = 65,232.05/x
3. Step 3: Cross multiply
   112,978.79x = 155,924.55 × 65,232.05
4. Step 4: Simplify right side
   112,978.79x = 10,171,278,431.64
5. Step 5: Solve for x
   x = 10,171,278,431.64/112,978.79
6. Step 6: Final answer
   x = 90,028.22