Finding the Fourth Proportional to 1,018.48, 1,526.76 and 607.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,018.48 : 1,526.76 = 607.72 : x
2. Step 2: Convert to fraction form
   1,018.48/1,526.76 = 607.72/x
3. Step 3: Cross multiply
   1,018.48x = 1,526.76 × 607.72
4. Step 4: Simplify right side
   1,018.48x = 927,842.59
5. Step 5: Solve for x
   x = 927,842.59/1,018.48
6. Step 6: Final answer
   x = 911.01