Finding the Fourth Proportional to 1,542.01, 2,128.20 and 878.93

Step by Step Solution

1. Step 1: Write the proportion equation
   1,542.01 : 2,128.20 = 878.93 : x
2. Step 2: Convert to fraction form
   1,542.01/2,128.20 = 878.93/x
3. Step 3: Cross multiply
   1,542.01x = 2,128.20 × 878.93
4. Step 4: Simplify right side
   1,542.01x = 1,870,538.83
5. Step 5: Solve for x
   x = 1,870,538.83/1,542.01
6. Step 6: Final answer
   x = 1,213.05