Finding the Fourth Proportional to 1,500.63, 2,070.72 and 911.13

Step by Step Solution

1. Step 1: Write the proportion equation
   1,500.63 : 2,070.72 = 911.13 : x
2. Step 2: Convert to fraction form
   1,500.63/2,070.72 = 911.13/x
3. Step 3: Cross multiply
   1,500.63x = 2,070.72 × 911.13
4. Step 4: Simplify right side
   1,500.63x = 1,886,695.11
5. Step 5: Solve for x
   x = 1,886,695.11/1,500.63
6. Step 6: Final answer
   x = 1,257.27