Finding the Fourth Proportional to 140,499.30, 210,311.55 and 136,125.30

Step by Step Solution

1. Step 1: Write the proportion equation
   140,499.30 : 210,311.55 = 136,125.30 : x
2. Step 2: Convert to fraction form
   140,499.30/210,311.55 = 136,125.30/x
3. Step 3: Cross multiply
   140,499.30x = 210,311.55 × 136,125.30
4. Step 4: Simplify right side
   140,499.30x = 28,628,722,837.22
5. Step 5: Solve for x
   x = 28,628,722,837.22/140,499.30
6. Step 6: Final answer
   x = 203,764.17