Finding the Fourth Proportional to 10,572.53, 15,870.33 and 7,790.58

Step by Step Solution

1. Step 1: Write the proportion equation
   10,572.53 : 15,870.33 = 7,790.58 : x
2. Step 2: Convert to fraction form
   10,572.53/15,870.33 = 7,790.58/x
3. Step 3: Cross multiply
   10,572.53x = 15,870.33 × 7,790.58
4. Step 4: Simplify right side
   10,572.53x = 123,639,075.49
5. Step 5: Solve for x
   x = 123,639,075.49/10,572.53
6. Step 6: Final answer
   x = 11,694.38