Finding the Fourth Proportional to 53,410.46, 80,115.71 and 20,138.00

Step by Step Solution

1. Step 1: Write the proportion equation
   53,410.46 : 80,115.71 = 20,138.00 : x
2. Step 2: Convert to fraction form
   53,410.46/80,115.71 = 20,138.00/x
3. Step 3: Cross multiply
   53,410.46x = 80,115.71 × 20,138.00
4. Step 4: Simplify right side
   53,410.46x = 1,613,369,666.71
5. Step 5: Solve for x
   x = 1,613,369,666.71/53,410.46
6. Step 6: Final answer
   x = 30,207.00