Finding the Fourth Proportional to 10,642.59, 15,947.40 and 7,312.42

Step by Step Solution

1. Step 1: Write the proportion equation
   10,642.59 : 15,947.40 = 7,312.42 : x
2. Step 2: Convert to fraction form
   10,642.59/15,947.40 = 7,312.42/x
3. Step 3: Cross multiply
   10,642.59x = 15,947.40 × 7,312.42
4. Step 4: Simplify right side
   10,642.59x = 116,614,050.15
5. Step 5: Solve for x
   x = 116,614,050.15/10,642.59
6. Step 6: Final answer
   x = 10,957.31