Finding the Fourth Proportional to 375,844.88, 563,690.82 and 139,131.30

Step by Step Solution

1. Step 1: Write the proportion equation
   375,844.88 : 563,690.82 = 139,131.30 : x
2. Step 2: Convert to fraction form
   375,844.88/563,690.82 = 139,131.30/x
3. Step 3: Cross multiply
   375,844.88x = 563,690.82 × 139,131.30
4. Step 4: Simplify right side
   375,844.88x = 78,427,036,584.67
5. Step 5: Solve for x
   x = 78,427,036,584.67/375,844.88
6. Step 6: Final answer
   x = 208,668.63