Finding the Fourth Proportional to 10,403.60, 14,356.71 and 5,687.78

Step by Step Solution

1. Step 1: Write the proportion equation
   10,403.60 : 14,356.71 = 5,687.78 : x
2. Step 2: Convert to fraction form
   10,403.60/14,356.71 = 5,687.78/x
3. Step 3: Cross multiply
   10,403.60x = 14,356.71 × 5,687.78
4. Step 4: Simplify right side
   10,403.60x = 81,657,736.22
5. Step 5: Solve for x
   x = 81,657,736.22/10,403.60
6. Step 6: Final answer
   x = 7,848.99