Finding the Fourth Proportional to 13,776.78, 19,012.17 and 7,808.32

Step by Step Solution

1. Step 1: Write the proportion equation
   13,776.78 : 19,012.17 = 7,808.32 : x
2. Step 2: Convert to fraction form
   13,776.78/19,012.17 = 7,808.32/x
3. Step 3: Cross multiply
   13,776.78x = 19,012.17 × 7,808.32
4. Step 4: Simplify right side
   13,776.78x = 148,453,049.22
5. Step 5: Solve for x
   x = 148,453,049.22/13,776.78
6. Step 6: Final answer
   x = 10,775.60