Finding the Fourth Proportional to 137,443.30, 206,099.97 and 53,242.90

Step by Step Solution

1. Step 1: Write the proportion equation
   137,443.30 : 206,099.97 = 53,242.90 : x
2. Step 2: Convert to fraction form
   137,443.30/206,099.97 = 53,242.90/x
3. Step 3: Cross multiply
   137,443.30x = 206,099.97 × 53,242.90
4. Step 4: Simplify right side
   137,443.30x = 10,973,360,092.71
5. Step 5: Solve for x
   x = 10,973,360,092.71/137,443.30
6. Step 6: Final answer
   x = 79,839.18