Finding the Fourth Proportional to 342,090.72, 472,071.27 and 189,119.18

Step by Step Solution

1. Step 1: Write the proportion equation
   342,090.72 : 472,071.27 = 189,119.18 : x
2. Step 2: Convert to fraction form
   342,090.72/472,071.27 = 189,119.18/x
3. Step 3: Cross multiply
   342,090.72x = 472,071.27 × 189,119.18
4. Step 4: Simplify right side
   342,090.72x = 89,277,731,483.96
5. Step 5: Solve for x
   x = 89,277,731,483.96/342,090.72
6. Step 6: Final answer
   x = 260,976.77