Finding the Fourth Proportional to 276,250.52, 414,255.06 and 139,389.50

Step by Step Solution

1. Step 1: Write the proportion equation
   276,250.52 : 414,255.06 = 139,389.50 : x
2. Step 2: Convert to fraction form
   276,250.52/414,255.06 = 139,389.50/x
3. Step 3: Cross multiply
   276,250.52x = 414,255.06 × 139,389.50
4. Step 4: Simplify right side
   276,250.52x = 57,742,803,614.59
5. Step 5: Solve for x
   x = 57,742,803,614.59/276,250.52
6. Step 6: Final answer
   x = 209,023.33