Finding the Fourth Proportional to 10,521.29, 14,538.62 and 10,008.76

Step by Step Solution

1. Step 1: Write the proportion equation
   10,521.29 : 14,538.62 = 10,008.76 : x
2. Step 2: Convert to fraction form
   10,521.29/14,538.62 = 10,008.76/x
3. Step 3: Cross multiply
   10,521.29x = 14,538.62 × 10,008.76
4. Step 4: Simplify right side
   10,521.29x = 145,513,558.31
5. Step 5: Solve for x
   x = 145,513,558.31/10,521.29
6. Step 6: Final answer
   x = 13,830.39