Finding the Fourth Proportional to 142,089.21, 196,070.69 and 91,011.83

Step by Step Solution

1. Step 1: Write the proportion equation
   142,089.21 : 196,070.69 = 91,011.83 : x
2. Step 2: Convert to fraction form
   142,089.21/196,070.69 = 91,011.83/x
3. Step 3: Cross multiply
   142,089.21x = 196,070.69 × 91,011.83
4. Step 4: Simplify right side
   142,089.21x = 17,844,752,306.26
5. Step 5: Solve for x
   x = 17,844,752,306.26/142,089.21
6. Step 6: Final answer
   x = 125,588.37