Finding the Fourth Proportional to 74,120.18, 111,146.52 and 31,980.30

Step by Step Solution

1. Step 1: Write the proportion equation
   74,120.18 : 111,146.52 = 31,980.30 : x
2. Step 2: Convert to fraction form
   74,120.18/111,146.52 = 31,980.30/x
3. Step 3: Cross multiply
   74,120.18x = 111,146.52 × 31,980.30
4. Step 4: Simplify right side
   74,120.18x = 3,554,499,053.56
5. Step 5: Solve for x
   x = 3,554,499,053.56/74,120.18
6. Step 6: Final answer
   x = 47,955.89