Finding the Fourth Proportional to 143,379.72, 215,064.72 and 54,630.05

Step by Step Solution

1. Step 1: Write the proportion equation
   143,379.72 : 215,064.72 = 54,630.05 : x
2. Step 2: Convert to fraction form
   143,379.72/215,064.72 = 54,630.05/x
3. Step 3: Cross multiply
   143,379.72x = 215,064.72 × 54,630.05
4. Step 4: Simplify right side
   143,379.72x = 11,748,995,331.51
5. Step 5: Solve for x
   x = 11,748,995,331.51/143,379.72
6. Step 6: Final answer
   x = 81,943.22