Finding the Fourth Proportional to 9,057.90, 12,499.90 and 5,079.01

Step by Step Solution

1. Step 1: Write the proportion equation
   9,057.90 : 12,499.90 = 5,079.01 : x
2. Step 2: Convert to fraction form
   9,057.90/12,499.90 = 5,079.01/x
3. Step 3: Cross multiply
   9,057.90x = 12,499.90 × 5,079.01
4. Step 4: Simplify right side
   9,057.90x = 63,487,117.10
5. Step 5: Solve for x
   x = 63,487,117.10/9,057.90
6. Step 6: Final answer
   x = 7,009.03