Finding the Fourth Proportional to 139,989.02, 210,025.92 and 50,019.95

Step by Step Solution

1. Step 1: Write the proportion equation
   139,989.02 : 210,025.92 = 50,019.95 : x
2. Step 2: Convert to fraction form
   139,989.02/210,025.92 = 50,019.95/x
3. Step 3: Cross multiply
   139,989.02x = 210,025.92 × 50,019.95
4. Step 4: Simplify right side
   139,989.02x = 10,505,486,017.10
5. Step 5: Solve for x
   x = 10,505,486,017.10/139,989.02
6. Step 6: Final answer
   x = 75,045.07