Finding the Fourth Proportional to 1,389,930.94, 2,085,051.93 and 443,081.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,389,930.94 : 2,085,051.93 = 443,081.98 : x
2. Step 2: Convert to fraction form
   1,389,930.94/2,085,051.93 = 443,081.98/x
3. Step 3: Cross multiply
   1,389,930.94x = 2,085,051.93 × 443,081.98
4. Step 4: Simplify right side
   1,389,930.94x = 923,848,937,547.22
5. Step 5: Solve for x
   x = 923,848,937,547.22/1,389,930.94
6. Step 6: Final answer
   x = 664,672.55