Finding the Fourth Proportional to 7,870.79, 10,861.76 and 4,334.01

Step by Step Solution

1. Step 1: Write the proportion equation
   7,870.79 : 10,861.76 = 4,334.01 : x
2. Step 2: Convert to fraction form
   7,870.79/10,861.76 = 4,334.01/x
3. Step 3: Cross multiply
   7,870.79x = 10,861.76 × 4,334.01
4. Step 4: Simplify right side
   7,870.79x = 47,074,987.29
5. Step 5: Solve for x
   x = 47,074,987.29/7,870.79
6. Step 6: Final answer
   x = 5,980.98