Finding the Fourth Proportional to 135,085.72, 202,564.98 and 78,942.04

Step by Step Solution

1. Step 1: Write the proportion equation
   135,085.72 : 202,564.98 = 78,942.04 : x
2. Step 2: Convert to fraction form
   135,085.72/202,564.98 = 78,942.04/x
3. Step 3: Cross multiply
   135,085.72x = 202,564.98 × 78,942.04
4. Step 4: Simplify right side
   135,085.72x = 15,990,892,753.76
5. Step 5: Solve for x
   x = 15,990,892,753.76/135,085.72
6. Step 6: Final answer
   x = 118,375.89