Finding the Fourth Proportional to 1,384.35, 2,075.52 and 715.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,384.35 : 2,075.52 = 715.59 : x
2. Step 2: Convert to fraction form
   1,384.35/2,075.52 = 715.59/x
3. Step 3: Cross multiply
   1,384.35x = 2,075.52 × 715.59
4. Step 4: Simplify right side
   1,384.35x = 1,485,221.36
5. Step 5: Solve for x
   x = 1,485,221.36/1,384.35
6. Step 6: Final answer
   x = 1,072.87