Finding the Fourth Proportional to 143,148.67, 214,656.37 and 53,128.69

Step by Step Solution

1. Step 1: Write the proportion equation
   143,148.67 : 214,656.37 = 53,128.69 : x
2. Step 2: Convert to fraction form
   143,148.67/214,656.37 = 53,128.69/x
3. Step 3: Cross multiply
   143,148.67x = 214,656.37 × 53,128.69
4. Step 4: Simplify right side
   143,148.67x = 11,404,411,068.79
5. Step 5: Solve for x
   x = 11,404,411,068.79/143,148.67
6. Step 6: Final answer
   x = 79,668.30