Finding the Fourth Proportional to 78,103.56, 117,131.10 and 28,177.16

Step by Step Solution

1. Step 1: Write the proportion equation
   78,103.56 : 117,131.10 = 28,177.16 : x
2. Step 2: Convert to fraction form
   78,103.56/117,131.10 = 28,177.16/x
3. Step 3: Cross multiply
   78,103.56x = 117,131.10 × 28,177.16
4. Step 4: Simplify right side
   78,103.56x = 3,300,421,265.68
5. Step 5: Solve for x
   x = 3,300,421,265.68/78,103.56
6. Step 6: Final answer
   x = 42,256.99