Finding the Fourth Proportional to 1,530.79, 2,112.42 and 901.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,530.79 : 2,112.42 = 901.18 : x
2. Step 2: Convert to fraction form
   1,530.79/2,112.42 = 901.18/x
3. Step 3: Cross multiply
   1,530.79x = 2,112.42 × 901.18
4. Step 4: Simplify right side
   1,530.79x = 1,903,670.66
5. Step 5: Solve for x
   x = 1,903,670.66/1,530.79
6. Step 6: Final answer
   x = 1,243.59