Finding the Fourth Proportional to 559,903.20, 839,853.72 and 139,179.48

Step by Step Solution

1. Step 1: Write the proportion equation
   559,903.20 : 839,853.72 = 139,179.48 : x
2. Step 2: Convert to fraction form
   559,903.20/839,853.72 = 139,179.48/x
3. Step 3: Cross multiply
   559,903.20x = 839,853.72 × 139,179.48
4. Step 4: Simplify right side
   559,903.20x = 116,890,404,025.67
5. Step 5: Solve for x
   x = 116,890,404,025.67/559,903.20
6. Step 6: Final answer
   x = 208,768.95