Finding the Fourth Proportional to 540,393.34, 745,781.40 and 298,670.72

Step by Step Solution

1. Step 1: Write the proportion equation
   540,393.34 : 745,781.40 = 298,670.72 : x
2. Step 2: Convert to fraction form
   540,393.34/745,781.40 = 298,670.72/x
3. Step 3: Cross multiply
   540,393.34x = 745,781.40 × 298,670.72
4. Step 4: Simplify right side
   540,393.34x = 222,743,067,700.61
5. Step 5: Solve for x
   x = 222,743,067,700.61/540,393.34
6. Step 6: Final answer
   x = 412,186.92