Finding the Fourth Proportional to 7,870.10, 11,803.59 and 3,917.30

Step by Step Solution

1. Step 1: Write the proportion equation
   7,870.10 : 11,803.59 = 3,917.30 : x
2. Step 2: Convert to fraction form
   7,870.10/11,803.59 = 3,917.30/x
3. Step 3: Cross multiply
   7,870.10x = 11,803.59 × 3,917.30
4. Step 4: Simplify right side
   7,870.10x = 46,238,144.09
5. Step 5: Solve for x
   x = 46,238,144.09/7,870.10
6. Step 6: Final answer
   x = 5,875.17