Finding the Fourth Proportional to 142,090.02, 196,071.81 and 91,012.64

Step by Step Solution

1. Step 1: Write the proportion equation
   142,090.02 : 196,071.81 = 91,012.64 : x
2. Step 2: Convert to fraction form
   142,090.02/196,071.81 = 91,012.64/x
3. Step 3: Cross multiply
   142,090.02x = 196,071.81 × 91,012.64
4. Step 4: Simplify right side
   142,090.02x = 17,845,013,057.68
5. Step 5: Solve for x
   x = 17,845,013,057.68/142,090.02
6. Step 6: Final answer
   x = 125,589.49