Finding the Fourth Proportional to 139,612.81, 209,350.02 and 49,642.02

Step by Step Solution

1. Step 1: Write the proportion equation
   139,612.81 : 209,350.02 = 49,642.02 : x
2. Step 2: Convert to fraction form
   139,612.81/209,350.02 = 49,642.02/x
3. Step 3: Cross multiply
   139,612.81x = 209,350.02 × 49,642.02
4. Step 4: Simplify right side
   139,612.81x = 10,392,558,141.53
5. Step 5: Solve for x
   x = 10,392,558,141.53/139,612.81
6. Step 6: Final answer
   x = 74,438.43