Finding the Fourth Proportional to 78,980.72, 109,066.56 and 50,736.02

Step by Step Solution

1. Step 1: Write the proportion equation
   78,980.72 : 109,066.56 = 50,736.02 : x
2. Step 2: Convert to fraction form
   78,980.72/109,066.56 = 50,736.02/x
3. Step 3: Cross multiply
   78,980.72x = 109,066.56 × 50,736.02
4. Step 4: Simplify right side
   78,980.72x = 5,533,603,251.90
5. Step 5: Solve for x
   x = 5,533,603,251.90/78,980.72
6. Step 6: Final answer
   x = 70,062.71