Finding the Fourth Proportional to 309,162.46, 463,656.21 and 140,588.50

Step by Step Solution

1. Step 1: Write the proportion equation
   309,162.46 : 463,656.21 = 140,588.50 : x
2. Step 2: Convert to fraction form
   309,162.46/463,656.21 = 140,588.50/x
3. Step 3: Cross multiply
   309,162.46x = 463,656.21 × 140,588.50
4. Step 4: Simplify right side
   309,162.46x = 65,184,731,079.59
5. Step 5: Solve for x
   x = 65,184,731,079.59/309,162.46
6. Step 6: Final answer
   x = 210,842.97