Finding the Fourth Proportional to 1,500.72, 2,070.96 and 837.60

Step by Step Solution

1. Step 1: Write the proportion equation
   1,500.72 : 2,070.96 = 837.60 : x
2. Step 2: Convert to fraction form
   1,500.72/2,070.96 = 837.60/x
3. Step 3: Cross multiply
   1,500.72x = 2,070.96 × 837.60
4. Step 4: Simplify right side
   1,500.72x = 1,734,636.10
5. Step 5: Solve for x
   x = 1,734,636.10/1,500.72
6. Step 6: Final answer
   x = 1,155.87