Finding the Fourth Proportional to 13,899.76, 19,181.70 and 7,526.42

Step by Step Solution

1. Step 1: Write the proportion equation
   13,899.76 : 19,181.70 = 7,526.42 : x
2. Step 2: Convert to fraction form
   13,899.76/19,181.70 = 7,526.42/x
3. Step 3: Cross multiply
   13,899.76x = 19,181.70 × 7,526.42
4. Step 4: Simplify right side
   13,899.76x = 144,369,530.51
5. Step 5: Solve for x
   x = 144,369,530.51/13,899.76
6. Step 6: Final answer
   x = 10,386.48