Finding the Fourth Proportional to 157,392.72, 215,980.02 and 143,136.72

Step by Step Solution

1. Step 1: Write the proportion equation
   157,392.72 : 215,980.02 = 143,136.72 : x
2. Step 2: Convert to fraction form
   157,392.72/215,980.02 = 143,136.72/x
3. Step 3: Cross multiply
   157,392.72x = 215,980.02 × 143,136.72
4. Step 4: Simplify right side
   157,392.72x = 30,914,671,648.33
5. Step 5: Solve for x
   x = 30,914,671,648.33/157,392.72
6. Step 6: Final answer
   x = 196,417.42