Finding the Fourth Proportional to 12,900.01, 19,393.77 and 10,300.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,900.01 : 19,393.77 = 10,300.72 : x
2. Step 2: Convert to fraction form
   12,900.01/19,393.77 = 10,300.72/x
3. Step 3: Cross multiply
   12,900.01x = 19,393.77 × 10,300.72
4. Step 4: Simplify right side
   12,900.01x = 199,769,794.51
5. Step 5: Solve for x
   x = 199,769,794.51/12,900.01
6. Step 6: Final answer
   x = 15,486.02