Finding the Fourth Proportional to 50,128.50, 69,170.74 and 29,978.02

Step by Step Solution

1. Step 1: Write the proportion equation
   50,128.50 : 69,170.74 = 29,978.02 : x
2. Step 2: Convert to fraction form
   50,128.50/69,170.74 = 29,978.02/x
3. Step 3: Cross multiply
   50,128.50x = 69,170.74 × 29,978.02
4. Step 4: Simplify right side
   50,128.50x = 2,073,601,827.13
5. Step 5: Solve for x
   x = 2,073,601,827.13/50,128.50
6. Step 6: Final answer
   x = 41,365.73