Finding the Fourth Proportional to 1,404.48, 2,106.51 and 538.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,404.48 : 2,106.51 = 538.59 : x
2. Step 2: Convert to fraction form
   1,404.48/2,106.51 = 538.59/x
3. Step 3: Cross multiply
   1,404.48x = 2,106.51 × 538.59
4. Step 4: Simplify right side
   1,404.48x = 1,134,551.10
5. Step 5: Solve for x
   x = 1,134,551.10/1,404.48
6. Step 6: Final answer
   x = 807.81