Finding the Fourth Proportional to 143,148.09, 214,655.47 and 53,128.10

Step by Step Solution

1. Step 1: Write the proportion equation
   143,148.09 : 214,655.47 = 53,128.10 : x
2. Step 2: Convert to fraction form
   143,148.09/214,655.47 = 53,128.10/x
3. Step 3: Cross multiply
   143,148.09x = 214,655.47 × 53,128.10
4. Step 4: Simplify right side
   143,148.09x = 11,404,237,275.71
5. Step 5: Solve for x
   x = 11,404,237,275.71/143,148.09
6. Step 6: Final answer
   x = 79,667.41