Finding the Fourth Proportional to 9,312.31, 13,965.46 and 3,070.87

Step by Step Solution

1. Step 1: Write the proportion equation
   9,312.31 : 13,965.46 = 3,070.87 : x
2. Step 2: Convert to fraction form
   9,312.31/13,965.46 = 3,070.87/x
3. Step 3: Cross multiply
   9,312.31x = 13,965.46 × 3,070.87
4. Step 4: Simplify right side
   9,312.31x = 42,886,112.15
5. Step 5: Solve for x
   x = 42,886,112.15/9,312.31
6. Step 6: Final answer
   x = 4,605.31