Finding the Fourth Proportional to 28,041.57, 42,053.76 and 9,316.71

Step by Step Solution

1. Step 1: Write the proportion equation
   28,041.57 : 42,053.76 = 9,316.71 : x
2. Step 2: Convert to fraction form
   28,041.57/42,053.76 = 9,316.71/x
3. Step 3: Cross multiply
   28,041.57x = 42,053.76 × 9,316.71
4. Step 4: Simplify right side
   28,041.57x = 391,802,686.33
5. Step 5: Solve for x
   x = 391,802,686.33/28,041.57
6. Step 6: Final answer
   x = 13,972.21