Finding the Fourth Proportional to 139,421.98, 208,585.52 and 107,591.56

Step by Step Solution

1. Step 1: Write the proportion equation
   139,421.98 : 208,585.52 = 107,591.56 : x
2. Step 2: Convert to fraction form
   139,421.98/208,585.52 = 107,591.56/x
3. Step 3: Cross multiply
   139,421.98x = 208,585.52 × 107,591.56
4. Step 4: Simplify right side
   139,421.98x = 22,442,041,490.21
5. Step 5: Solve for x
   x = 22,442,041,490.21/139,421.98
6. Step 6: Final answer
   x = 160,964.87