Finding the Fourth Proportional to 1,039,870.10, 1,557,472.35 and 853,246.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,039,870.10 : 1,557,472.35 = 853,246.10 : x
2. Step 2: Convert to fraction form
   1,039,870.10/1,557,472.35 = 853,246.10/x
3. Step 3: Cross multiply
   1,039,870.10x = 1,557,472.35 × 853,246.10
4. Step 4: Simplify right side
   1,039,870.10x = 1,328,907,208,495.34
5. Step 5: Solve for x
   x = 1,328,907,208,495.34/1,039,870.10
6. Step 6: Final answer
   x = 1,277,955.01