Finding the Fourth Proportional to 2,920.95, 4,381.86 and 972.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,920.95 : 4,381.86 = 972.69 : x
2. Step 2: Convert to fraction form
   2,920.95/4,381.86 = 972.69/x
3. Step 3: Cross multiply
   2,920.95x = 4,381.86 × 972.69
4. Step 4: Simplify right side
   2,920.95x = 4,262,191.40
5. Step 5: Solve for x
   x = 4,262,191.40/2,920.95
6. Step 6: Final answer
   x = 1,459.18