Finding the Fourth Proportional to 68,311.91, 102,437.76 and 30,870.47

Step by Step Solution

1. Step 1: Write the proportion equation
   68,311.91 : 102,437.76 = 30,870.47 : x
2. Step 2: Convert to fraction form
   68,311.91/102,437.76 = 30,870.47/x
3. Step 3: Cross multiply
   68,311.91x = 102,437.76 × 30,870.47
4. Step 4: Simplify right side
   68,311.91x = 3,162,301,592.59
5. Step 5: Solve for x
   x = 3,162,301,592.59/68,311.91
6. Step 6: Final answer
   x = 46,292.10