Finding the Fourth Proportional to 142,603.94, 196,802.70 and 78,941.72

Step by Step Solution

1. Step 1: Write the proportion equation
   142,603.94 : 196,802.70 = 78,941.72 : x
2. Step 2: Convert to fraction form
   142,603.94/196,802.70 = 78,941.72/x
3. Step 3: Cross multiply
   142,603.94x = 196,802.70 × 78,941.72
4. Step 4: Simplify right side
   142,603.94x = 15,535,943,638.64
5. Step 5: Solve for x
   x = 15,535,943,638.64/142,603.94
6. Step 6: Final answer
   x = 108,944.70