Finding the Fourth Proportional to 1,300.79, 1,938.23 and 1,238.01

Step by Step Solution

1. Step 1: Write the proportion equation
   1,300.79 : 1,938.23 = 1,238.01 : x
2. Step 2: Convert to fraction form
   1,300.79/1,938.23 = 1,238.01/x
3. Step 3: Cross multiply
   1,300.79x = 1,938.23 × 1,238.01
4. Step 4: Simplify right side
   1,300.79x = 2,399,541.93
5. Step 5: Solve for x
   x = 2,399,541.93/1,300.79
6. Step 6: Final answer
   x = 1,844.69