Finding the Fourth Proportional to 85,301.28, 128,601.48 and 79,287.84

Step by Step Solution

1. Step 1: Write the proportion equation
   85,301.28 : 128,601.48 = 79,287.84 : x
2. Step 2: Convert to fraction form
   85,301.28/128,601.48 = 79,287.84/x
3. Step 3: Cross multiply
   85,301.28x = 128,601.48 × 79,287.84
4. Step 4: Simplify right side
   85,301.28x = 10,196,533,570.00
5. Step 5: Solve for x
   x = 10,196,533,570.00/85,301.28
6. Step 6: Final answer
   x = 119,535.53