Finding the Fourth Proportional to 141,397.76, 212,040.82 and 57,142.04

Step by Step Solution

1. Step 1: Write the proportion equation
   141,397.76 : 212,040.82 = 57,142.04 : x
2. Step 2: Convert to fraction form
   141,397.76/212,040.82 = 57,142.04/x
3. Step 3: Cross multiply
   141,397.76x = 212,040.82 × 57,142.04
4. Step 4: Simplify right side
   141,397.76x = 12,116,445,018.07
5. Step 5: Solve for x
   x = 12,116,445,018.07/141,397.76
6. Step 6: Final answer
   x = 85,690.50