Finding the Fourth Proportional to 140,972.43, 194,488.58 and 89,987.07

Step by Step Solution

1. Step 1: Write the proportion equation
   140,972.43 : 194,488.58 = 89,987.07 : x
2. Step 2: Convert to fraction form
   140,972.43/194,488.58 = 89,987.07/x
3. Step 3: Cross multiply
   140,972.43x = 194,488.58 × 89,987.07
4. Step 4: Simplify right side
   140,972.43x = 17,501,457,012.73
5. Step 5: Solve for x
   x = 17,501,457,012.73/140,972.43
6. Step 6: Final answer
   x = 124,148.08