Finding the Fourth Proportional to 72,836.56, 109,332.60 and 31,312.72

Step by Step Solution

1. Step 1: Write the proportion equation
   72,836.56 : 109,332.60 = 31,312.72 : x
2. Step 2: Convert to fraction form
   72,836.56/109,332.60 = 31,312.72/x
3. Step 3: Cross multiply
   72,836.56x = 109,332.60 × 31,312.72
4. Step 4: Simplify right side
   72,836.56x = 3,423,501,090.67
5. Step 5: Solve for x
   x = 3,423,501,090.67/72,836.56
6. Step 6: Final answer
   x = 47,002.51