Finding the Fourth Proportional to 78,088.50, 117,157.86 and 28,168.20

Step by Step Solution

1. Step 1: Write the proportion equation
   78,088.50 : 117,157.86 = 28,168.20 : x
2. Step 2: Convert to fraction form
   78,088.50/117,157.86 = 28,168.20/x
3. Step 3: Cross multiply
   78,088.50x = 117,157.86 × 28,168.20
4. Step 4: Simplify right side
   78,088.50x = 3,300,126,032.05
5. Step 5: Solve for x
   x = 3,300,126,032.05/78,088.50
6. Step 6: Final answer
   x = 42,261.36