Finding the Fourth Proportional to 8,070.88, 12,111.86 and 3,140.56

Step by Step Solution

1. Step 1: Write the proportion equation
   8,070.88 : 12,111.86 = 3,140.56 : x
2. Step 2: Convert to fraction form
   8,070.88/12,111.86 = 3,140.56/x
3. Step 3: Cross multiply
   8,070.88x = 12,111.86 × 3,140.56
4. Step 4: Simplify right side
   8,070.88x = 38,038,023.04
5. Step 5: Solve for x
   x = 38,038,023.04/8,070.88
6. Step 6: Final answer
   x = 4,713.00