Finding the Fourth Proportional to 10,386.51, 14,332.71 and 5,670.78

Step by Step Solution

1. Step 1: Write the proportion equation
   10,386.51 : 14,332.71 = 5,670.78 : x
2. Step 2: Convert to fraction form
   10,386.51/14,332.71 = 5,670.78/x
3. Step 3: Cross multiply
   10,386.51x = 14,332.71 × 5,670.78
4. Step 4: Simplify right side
   10,386.51x = 81,277,645.21
5. Step 5: Solve for x
   x = 81,277,645.21/10,386.51
6. Step 6: Final answer
   x = 7,825.31