Finding the Fourth Proportional to 137,697.55, 190,143.79 and 86,103.07

Step by Step Solution

1. Step 1: Write the proportion equation
   137,697.55 : 190,143.79 = 86,103.07 : x
2. Step 2: Convert to fraction form
   137,697.55/190,143.79 = 86,103.07/x
3. Step 3: Cross multiply
   137,697.55x = 190,143.79 × 86,103.07
4. Step 4: Simplify right side
   137,697.55x = 16,371,963,369.82
5. Step 5: Solve for x
   x = 16,371,963,369.82/137,697.55
6. Step 6: Final answer
   x = 118,898.00