Finding the Fourth Proportional to 1,685,300.15, 2,325,722.43 and 921,353.75

Step by Step Solution

1. Step 1: Write the proportion equation
   1,685,300.15 : 2,325,722.43 = 921,353.75 : x
2. Step 2: Convert to fraction form
   1,685,300.15/2,325,722.43 = 921,353.75/x
3. Step 3: Cross multiply
   1,685,300.15x = 2,325,722.43 × 921,353.75
4. Step 4: Simplify right side
   1,685,300.15x = 2,142,813,082,339.61
5. Step 5: Solve for x
   x = 2,142,813,082,339.61/1,685,300.15
6. Step 6: Final answer
   x = 1,271,472.67