Finding the Fourth Proportional to 1,112.45, 1,666.69 and 948.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,112.45 : 1,666.69 = 948.47 : x
2. Step 2: Convert to fraction form
   1,112.45/1,666.69 = 948.47/x
3. Step 3: Cross multiply
   1,112.45x = 1,666.69 × 948.47
4. Step 4: Simplify right side
   1,112.45x = 1,580,794.76
5. Step 5: Solve for x
   x = 1,580,794.76/1,112.45
6. Step 6: Final answer
   x = 1,421.01