Finding the Fourth Proportional to 78,112.72, 117,156.84 and 28,185.04

Step by Step Solution

1. Step 1: Write the proportion equation
   78,112.72 : 117,156.84 = 28,185.04 : x
2. Step 2: Convert to fraction form
   78,112.72/117,156.84 = 28,185.04/x
3. Step 3: Cross multiply
   78,112.72x = 117,156.84 × 28,185.04
4. Step 4: Simplify right side
   78,112.72x = 3,302,070,221.67
5. Step 5: Solve for x
   x = 3,302,070,221.67/78,112.72
6. Step 6: Final answer
   x = 42,273.14