Finding the Fourth Proportional to 78,103.25, 117,130.67 and 28,176.86

Step by Step Solution

1. Step 1: Write the proportion equation
   78,103.25 : 117,130.67 = 28,176.86 : x
2. Step 2: Convert to fraction form
   78,103.25/117,130.67 = 28,176.86/x
3. Step 3: Cross multiply
   78,103.25x = 117,130.67 × 28,176.86
4. Step 4: Simplify right side
   78,103.25x = 3,300,374,642.24
5. Step 5: Solve for x
   x = 3,300,374,642.24/78,103.25
6. Step 6: Final answer
   x = 42,256.56