Finding the Fourth Proportional to 12,960.54, 19,422.18 and 7,402.32

Step by Step Solution

1. Step 1: Write the proportion equation
   12,960.54 : 19,422.18 = 7,402.32 : x
2. Step 2: Convert to fraction form
   12,960.54/19,422.18 = 7,402.32/x
3. Step 3: Cross multiply
   12,960.54x = 19,422.18 × 7,402.32
4. Step 4: Simplify right side
   12,960.54x = 143,769,191.46
5. Step 5: Solve for x
   x = 143,769,191.46/12,960.54
6. Step 6: Final answer
   x = 11,092.84