Finding the Fourth Proportional to 86,978.34, 130,525.92 and 31,574.34

Step by Step Solution

1. Step 1: Write the proportion equation
   86,978.34 : 130,525.92 = 31,574.34 : x
2. Step 2: Convert to fraction form
   86,978.34/130,525.92 = 31,574.34/x
3. Step 3: Cross multiply
   86,978.34x = 130,525.92 × 31,574.34
4. Step 4: Simplify right side
   86,978.34x = 4,121,269,776.89
5. Step 5: Solve for x
   x = 4,121,269,776.89/86,978.34
6. Step 6: Final answer
   x = 47,382.71