Finding the Fourth Proportional to 139,990.02, 210,027.42 and 50,020.96

Step by Step Solution

1. Step 1: Write the proportion equation
   139,990.02 : 210,027.42 = 50,020.96 : x
2. Step 2: Convert to fraction form
   139,990.02/210,027.42 = 50,020.96/x
3. Step 3: Cross multiply
   139,990.02x = 210,027.42 × 50,020.96
4. Step 4: Simplify right side
   139,990.02x = 10,505,773,174.72
5. Step 5: Solve for x
   x = 10,505,773,174.72/139,990.02
6. Step 6: Final answer
   x = 75,046.59