Finding the Fourth Proportional to 13,012.23, 19,486.89 and 7,448.72

Step by Step Solution

1. Step 1: Write the proportion equation
   13,012.23 : 19,486.89 = 7,448.72 : x
2. Step 2: Convert to fraction form
   13,012.23/19,486.89 = 7,448.72/x
3. Step 3: Cross multiply
   13,012.23x = 19,486.89 × 7,448.72
4. Step 4: Simplify right side
   13,012.23x = 145,152,252.60
5. Step 5: Solve for x
   x = 145,152,252.60/13,012.23
6. Step 6: Final answer
   x = 11,155.06