Finding the Fourth Proportional to 79,738.94, 110,158.71 and 64,402.60

Step by Step Solution

1. Step 1: Write the proportion equation
   79,738.94 : 110,158.71 = 64,402.60 : x
2. Step 2: Convert to fraction form
   79,738.94/110,158.71 = 64,402.60/x
3. Step 3: Cross multiply
   79,738.94x = 110,158.71 × 64,402.60
4. Step 4: Simplify right side
   79,738.94x = 7,094,507,336.65
5. Step 5: Solve for x
   x = 7,094,507,336.65/79,738.94
6. Step 6: Final answer
   x = 88,971.68