Finding the Fourth Proportional to 140,499.59, 210,897.90 and 137,326.61

Step by Step Solution

1. Step 1: Write the proportion equation
   140,499.59 : 210,897.90 = 137,326.61 : x
2. Step 2: Convert to fraction form
   140,499.59/210,897.90 = 137,326.61/x
3. Step 3: Cross multiply
   140,499.59x = 210,897.90 × 137,326.61
4. Step 4: Simplify right side
   140,499.59x = 28,961,892,608.63
5. Step 5: Solve for x
   x = 28,961,892,608.63/140,499.59
6. Step 6: Final answer
   x = 206,135.08