Finding the Fourth Proportional to 213,078.56, 319,534.72 and 79,886.16

Step by Step Solution

1. Step 1: Write the proportion equation
   213,078.56 : 319,534.72 = 79,886.16 : x
2. Step 2: Convert to fraction form
   213,078.56/319,534.72 = 79,886.16/x
3. Step 3: Cross multiply
   213,078.56x = 319,534.72 × 79,886.16
4. Step 4: Simplify right side
   213,078.56x = 25,526,401,767.48
5. Step 5: Solve for x
   x = 25,526,401,767.48/213,078.56
6. Step 6: Final answer
   x = 119,798.08