Finding the Fourth Proportional to 78,113.72, 117,158.34 and 28,186.04

Step by Step Solution

1. Step 1: Write the proportion equation
   78,113.72 : 117,158.34 = 28,186.04 : x
2. Step 2: Convert to fraction form
   78,113.72/117,158.34 = 28,186.04/x
3. Step 3: Cross multiply
   78,113.72x = 117,158.34 × 28,186.04
4. Step 4: Simplify right side
   78,113.72x = 3,302,229,657.57
5. Step 5: Solve for x
   x = 3,302,229,657.57/78,113.72
6. Step 6: Final answer
   x = 42,274.64