Finding the Fourth Proportional to 1,385.84, 2,068.61 and 1,221.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,385.84 : 2,068.61 = 1,221.82 : x
2. Step 2: Convert to fraction form
   1,385.84/2,068.61 = 1,221.82/x
3. Step 3: Cross multiply
   1,385.84x = 2,068.61 × 1,221.82
4. Step 4: Simplify right side
   1,385.84x = 2,527,469.07
5. Step 5: Solve for x
   x = 2,527,469.07/1,385.84
6. Step 6: Final answer
   x = 1,823.78