Finding the Fourth Proportional to 231,510.72, 347,279.52 and 89,356.80

Step by Step Solution

1. Step 1: Write the proportion equation
   231,510.72 : 347,279.52 = 89,356.80 : x
2. Step 2: Convert to fraction form
   231,510.72/347,279.52 = 89,356.80/x
3. Step 3: Cross multiply
   231,510.72x = 347,279.52 × 89,356.80
4. Step 4: Simplify right side
   231,510.72x = 31,031,786,612.74
5. Step 5: Solve for x
   x = 31,031,786,612.74/231,510.72
6. Step 6: Final answer
   x = 134,040.39