Finding the Fourth Proportional to 1,536.63, 2,105.78 and 1,389.01

Step by Step Solution

1. Step 1: Write the proportion equation
   1,536.63 : 2,105.78 = 1,389.01 : x
2. Step 2: Convert to fraction form
   1,536.63/2,105.78 = 1,389.01/x
3. Step 3: Cross multiply
   1,536.63x = 2,105.78 × 1,389.01
4. Step 4: Simplify right side
   1,536.63x = 2,924,949.48
5. Step 5: Solve for x
   x = 2,924,949.48/1,536.63
6. Step 6: Final answer
   x = 1,903.48