Finding the Fourth Proportional to 141,389.76, 212,028.81 and 57,134.01

Step by Step Solution

1. Step 1: Write the proportion equation
   141,389.76 : 212,028.81 = 57,134.01 : x
2. Step 2: Convert to fraction form
   141,389.76/212,028.81 = 57,134.01/x
3. Step 3: Cross multiply
   141,389.76x = 212,028.81 × 57,134.01
4. Step 4: Simplify right side
   141,389.76x = 12,114,056,150.83
5. Step 5: Solve for x
   x = 12,114,056,150.83/141,389.76
6. Step 6: Final answer
   x = 85,678.45