Finding the Fourth Proportional to 1,048.98, 1,572.32 and 528.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,048.98 : 1,572.32 = 528.15 : x
2. Step 2: Convert to fraction form
   1,048.98/1,572.32 = 528.15/x
3. Step 3: Cross multiply
   1,048.98x = 1,572.32 × 528.15
4. Step 4: Simplify right side
   1,048.98x = 830,410.31
5. Step 5: Solve for x
   x = 830,410.31/1,048.98
6. Step 6: Final answer
   x = 791.64