Finding the Fourth Proportional to 12,642.82, 18,953.93 and 4,740.90

Step by Step Solution

1. Step 1: Write the proportion equation
   12,642.82 : 18,953.93 = 4,740.90 : x
2. Step 2: Convert to fraction form
   12,642.82/18,953.93 = 4,740.90/x
3. Step 3: Cross multiply
   12,642.82x = 18,953.93 × 4,740.90
4. Step 4: Simplify right side
   12,642.82x = 89,858,627.51
5. Step 5: Solve for x
   x = 89,858,627.51/12,642.82
6. Step 6: Final answer
   x = 7,107.48