Finding the Fourth Proportional to 28,648.56, 42,953.78 and 14,613.68

Step by Step Solution

1. Step 1: Write the proportion equation
   28,648.56 : 42,953.78 = 14,613.68 : x
2. Step 2: Convert to fraction form
   28,648.56/42,953.78 = 14,613.68/x
3. Step 3: Cross multiply
   28,648.56x = 42,953.78 × 14,613.68
4. Step 4: Simplify right side
   28,648.56x = 627,712,795.71
5. Step 5: Solve for x
   x = 627,712,795.71/28,648.56
6. Step 6: Final answer
   x = 21,910.80