Finding the Fourth Proportional to 72,840.88, 100,513.47 and 53,731

Step by Step Solution

1. Step 1: Write the proportion equation
   72,840.88 : 100,513.47 = 53,731 : x
2. Step 2: Convert to fraction form
   72,840.88/100,513.47 = 53,731/x
3. Step 3: Cross multiply
   72,840.88x = 100,513.47 × 53,731
4. Step 4: Simplify right side
   72,840.88x = 5,400,689,256.57
5. Step 5: Solve for x
   x = 5,400,689,256.57/72,840.88
6. Step 6: Final answer
   x = 74,143.66