Finding the Fourth Proportional to 1,384.63, 1,910.78 and 763.63

Step by Step Solution

1. Step 1: Write the proportion equation
   1,384.63 : 1,910.78 = 763.63 : x
2. Step 2: Convert to fraction form
   1,384.63/1,910.78 = 763.63/x
3. Step 3: Cross multiply
   1,384.63x = 1,910.78 × 763.63
4. Step 4: Simplify right side
   1,384.63x = 1,459,128.93
5. Step 5: Solve for x
   x = 1,459,128.93/1,384.63
6. Step 6: Final answer
   x = 1,053.80