Finding the Fourth Proportional to 406,981.39, 610,479.01 and 140,748.83

Step by Step Solution

1. Step 1: Write the proportion equation
   406,981.39 : 610,479.01 = 140,748.83 : x
2. Step 2: Convert to fraction form
   406,981.39/610,479.01 = 140,748.83/x
3. Step 3: Cross multiply
   406,981.39x = 610,479.01 × 140,748.83
4. Step 4: Simplify right side
   406,981.39x = 85,924,204,654.51
5. Step 5: Solve for x
   x = 85,924,204,654.51/406,981.39
6. Step 6: Final answer
   x = 211,125.63