Finding the Fourth Proportional to 142,106.61, 212,974.80 and 57,768.25

Step by Step Solution

1. Step 1: Write the proportion equation
   142,106.61 : 212,974.80 = 57,768.25 : x
2. Step 2: Convert to fraction form
   142,106.61/212,974.80 = 57,768.25/x
3. Step 3: Cross multiply
   142,106.61x = 212,974.80 × 57,768.25
4. Step 4: Simplify right side
   142,106.61x = 12,303,181,490.10
5. Step 5: Solve for x
   x = 12,303,181,490.10/142,106.61
6. Step 6: Final answer
   x = 86,577.12