Finding the Fourth Proportional to 1,404.31, 2,106.52 and 526.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,404.31 : 2,106.52 = 526.72 : x
2. Step 2: Convert to fraction form
   1,404.31/2,106.52 = 526.72/x
3. Step 3: Cross multiply
   1,404.31x = 2,106.52 × 526.72
4. Step 4: Simplify right side
   1,404.31x = 1,109,553.21
5. Step 5: Solve for x
   x = 1,109,553.21/1,404.31
6. Step 6: Final answer
   x = 790.10