Finding the Fourth Proportional to 406,978.15, 610,384.09 and 154,171.48

Step by Step Solution

1. Step 1: Write the proportion equation
   406,978.15 : 610,384.09 = 154,171.48 : x
2. Step 2: Convert to fraction form
   406,978.15/610,384.09 = 154,171.48/x
3. Step 3: Cross multiply
   406,978.15x = 610,384.09 × 154,171.48
4. Step 4: Simplify right side
   406,978.15x = 94,103,814,700.98
5. Step 5: Solve for x
   x = 94,103,814,700.98/406,978.15
6. Step 6: Final answer
   x = 231,225.72