Finding the Fourth Proportional to 137,445.90, 189,766.71 and 105,557.82

Step by Step Solution

1. Step 1: Write the proportion equation
   137,445.90 : 189,766.71 = 105,557.82 : x
2. Step 2: Convert to fraction form
   137,445.90/189,766.71 = 105,557.82/x
3. Step 3: Cross multiply
   137,445.90x = 189,766.71 × 105,557.82
4. Step 4: Simplify right side
   137,445.90x = 20,031,360,216.17
5. Step 5: Solve for x
   x = 20,031,360,216.17/137,445.90
6. Step 6: Final answer
   x = 145,739.96