Finding the Fourth Proportional to 2,112,821.21, 3,168,084.86 and 959,434.47

Step by Step Solution

1. Step 1: Write the proportion equation
   2,112,821.21 : 3,168,084.86 = 959,434.47 : x
2. Step 2: Convert to fraction form
   2,112,821.21/3,168,084.86 = 959,434.47/x
3. Step 3: Cross multiply
   2,112,821.21x = 3,168,084.86 × 959,434.47
4. Step 4: Simplify right side
   2,112,821.21x = 3,039,569,817,369.83
5. Step 5: Solve for x
   x = 3,039,569,817,369.83/2,112,821.21
6. Step 6: Final answer
   x = 1,438,630.87