Finding the Fourth Proportional to 115,131.02, 158,878.42 and 64,143.68

Step by Step Solution

1. Step 1: Write the proportion equation
   115,131.02 : 158,878.42 = 64,143.68 : x
2. Step 2: Convert to fraction form
   115,131.02/158,878.42 = 64,143.68/x
3. Step 3: Cross multiply
   115,131.02x = 158,878.42 × 64,143.68
4. Step 4: Simplify right side
   115,131.02x = 10,191,046,768.22
5. Step 5: Solve for x
   x = 10,191,046,768.22/115,131.02
6. Step 6: Final answer
   x = 88,516.95