Finding the Fourth Proportional to 342,071.77, 472,018.15 and 189,089.36

Step by Step Solution

1. Step 1: Write the proportion equation
   342,071.77 : 472,018.15 = 189,089.36 : x
2. Step 2: Convert to fraction form
   342,071.77/472,018.15 = 189,089.36/x
3. Step 3: Cross multiply
   342,071.77x = 472,018.15 × 189,089.36
4. Step 4: Simplify right side
   342,071.77x = 89,253,609,891.88
5. Step 5: Solve for x
   x = 89,253,609,891.88/342,071.77
6. Step 6: Final answer
   x = 260,920.71