Finding the Fourth Proportional to 404,314.39, 606,544.21 and 138,012.63

Step by Step Solution

1. Step 1: Write the proportion equation
   404,314.39 : 606,544.21 = 138,012.63 : x
2. Step 2: Convert to fraction form
   404,314.39/606,544.21 = 138,012.63/x
3. Step 3: Cross multiply
   404,314.39x = 606,544.21 × 138,012.63
4. Step 4: Simplify right side
   404,314.39x = 83,710,761,633.37
5. Step 5: Solve for x
   x = 83,710,761,633.37/404,314.39
6. Step 6: Final answer
   x = 207,043.74