Finding the Fourth Proportional to 559,905.20, 839,856.72 and 139,181.48

Step by Step Solution

1. Step 1: Write the proportion equation
   559,905.20 : 839,856.72 = 139,181.48 : x
2. Step 2: Convert to fraction form
   559,905.20/839,856.72 = 139,181.48/x
3. Step 3: Cross multiply
   559,905.20x = 839,856.72 × 139,181.48
4. Step 4: Simplify right side
   559,905.20x = 116,892,501,277.55
5. Step 5: Solve for x
   x = 116,892,501,277.55/559,905.20
6. Step 6: Final answer
   x = 208,771.95