Finding the Fourth Proportional to 1,500.39, 2,069.35 and 910.91

Step by Step Solution

1. Step 1: Write the proportion equation
   1,500.39 : 2,069.35 = 910.91 : x
2. Step 2: Convert to fraction form
   1,500.39/2,069.35 = 910.91/x
3. Step 3: Cross multiply
   1,500.39x = 2,069.35 × 910.91
4. Step 4: Simplify right side
   1,500.39x = 1,884,994.50
5. Step 5: Solve for x
   x = 1,884,994.50/1,500.39
6. Step 6: Final answer
   x = 1,256.34