Finding the Fourth Proportional to 149,773.42, 206,670.36 and 86,131.72

Step by Step Solution

1. Step 1: Write the proportion equation
   149,773.42 : 206,670.36 = 86,131.72 : x
2. Step 2: Convert to fraction form
   149,773.42/206,670.36 = 86,131.72/x
3. Step 3: Cross multiply
   149,773.42x = 206,670.36 × 86,131.72
4. Step 4: Simplify right side
   149,773.42x = 17,800,873,579.82
5. Step 5: Solve for x
   x = 17,800,873,579.82/149,773.42
6. Step 6: Final answer
   x = 118,852.02