Finding the Fourth Proportional to 9,056.56, 12,522.72 and 7,890.16

Step by Step Solution

1. Step 1: Write the proportion equation
   9,056.56 : 12,522.72 = 7,890.16 : x
2. Step 2: Convert to fraction form
   9,056.56/12,522.72 = 7,890.16/x
3. Step 3: Cross multiply
   9,056.56x = 12,522.72 × 7,890.16
4. Step 4: Simplify right side
   9,056.56x = 98,806,264.44
5. Step 5: Solve for x
   x = 98,806,264.44/9,056.56
6. Step 6: Final answer
   x = 10,909.91