Finding the Fourth Proportional to 1,068.58, 1,601.52 and 520.93

Step by Step Solution

1. Step 1: Write the proportion equation
   1,068.58 : 1,601.52 = 520.93 : x
2. Step 2: Convert to fraction form
   1,068.58/1,601.52 = 520.93/x
3. Step 3: Cross multiply
   1,068.58x = 1,601.52 × 520.93
4. Step 4: Simplify right side
   1,068.58x = 834,279.81
5. Step 5: Solve for x
   x = 834,279.81/1,068.58
6. Step 6: Final answer
   x = 780.74