Finding the Fourth Proportional to 13,030.88, 19,572.51 and 7,776.15

Step by Step Solution

1. Step 1: Write the proportion equation
   13,030.88 : 19,572.51 = 7,776.15 : x
2. Step 2: Convert to fraction form
   13,030.88/19,572.51 = 7,776.15/x
3. Step 3: Cross multiply
   13,030.88x = 19,572.51 × 7,776.15
4. Step 4: Simplify right side
   13,030.88x = 152,198,773.64
5. Step 5: Solve for x
   x = 152,198,773.64/13,030.88
6. Step 6: Final answer
   x = 11,679.86