Finding the Fourth Proportional to 1,500.77, 2,070.87 and 837.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,500.77 : 2,070.87 = 837.57 : x
2. Step 2: Convert to fraction form
   1,500.77/2,070.87 = 837.57/x
3. Step 3: Cross multiply
   1,500.77x = 2,070.87 × 837.57
4. Step 4: Simplify right side
   1,500.77x = 1,734,498.59
5. Step 5: Solve for x
   x = 1,734,498.59/1,500.77
6. Step 6: Final answer
   x = 1,155.74