Finding the Fourth Proportional to 142,156.14, 213,308.01 and 57,978.06

Step by Step Solution

1. Step 1: Write the proportion equation
   142,156.14 : 213,308.01 = 57,978.06 : x
2. Step 2: Convert to fraction form
   142,156.14/213,308.01 = 57,978.06/x
3. Step 3: Cross multiply
   142,156.14x = 213,308.01 × 57,978.06
4. Step 4: Simplify right side
   142,156.14x = 12,367,184,602.26
5. Step 5: Solve for x
   x = 12,367,184,602.26/142,156.14
6. Step 6: Final answer
   x = 86,997.19