Finding the Fourth Proportional to 7,870.78, 10,862.13 and 4,334.05

Step by Step Solution

1. Step 1: Write the proportion equation
   7,870.78 : 10,862.13 = 4,334.05 : x
2. Step 2: Convert to fraction form
   7,870.78/10,862.13 = 4,334.05/x
3. Step 3: Cross multiply
   7,870.78x = 10,862.13 × 4,334.05
4. Step 4: Simplify right side
   7,870.78x = 47,077,014.53
5. Step 5: Solve for x
   x = 47,077,014.53/7,870.78
6. Step 6: Final answer
   x = 5,981.24