Finding the Fourth Proportional to 1,072.63, 1,480.50 and 607.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,072.63 : 1,480.50 = 607.15 : x
2. Step 2: Convert to fraction form
   1,072.63/1,480.50 = 607.15/x
3. Step 3: Cross multiply
   1,072.63x = 1,480.50 × 607.15
4. Step 4: Simplify right side
   1,072.63x = 898,875.14
5. Step 5: Solve for x
   x = 898,875.14/1,072.63
6. Step 6: Final answer
   x = 838.01