Finding the Fourth Proportional to 142,088.21, 196,069.31 and 91,010.83

Step by Step Solution

1. Step 1: Write the proportion equation
   142,088.21 : 196,069.31 = 91,010.83 : x
2. Step 2: Convert to fraction form
   142,088.21/196,069.31 = 91,010.83/x
3. Step 3: Cross multiply
   142,088.21x = 196,069.31 × 91,010.83
4. Step 4: Simplify right side
   142,088.21x = 17,844,429,660.28
5. Step 5: Solve for x
   x = 17,844,429,660.28/142,088.21
6. Step 6: Final answer
   x = 125,586.98