Finding the Fourth Proportional to 149,839.02, 206,784.15 and 86,176.89

Step by Step Solution

1. Step 1: Write the proportion equation
   149,839.02 : 206,784.15 = 86,176.89 : x
2. Step 2: Convert to fraction form
   149,839.02/206,784.15 = 86,176.89/x
3. Step 3: Cross multiply
   149,839.02x = 206,784.15 × 86,176.89
4. Step 4: Simplify right side
   149,839.02x = 17,820,014,948.29
5. Step 5: Solve for x
   x = 17,820,014,948.29/149,839.02
6. Step 6: Final answer
   x = 118,927.73