Finding the Fourth Proportional to 72,890.88, 109,343.04 and 31,328.32

Step by Step Solution

1. Step 1: Write the proportion equation
   72,890.88 : 109,343.04 = 31,328.32 : x
2. Step 2: Convert to fraction form
   72,890.88/109,343.04 = 31,328.32/x
3. Step 3: Cross multiply
   72,890.88x = 109,343.04 × 31,328.32
4. Step 4: Simplify right side
   72,890.88x = 3,425,533,746.89
5. Step 5: Solve for x
   x = 3,425,533,746.89/72,890.88
6. Step 6: Final answer
   x = 46,995.37