Finding the Fourth Proportional to 81,753.72, 112,749.88 and 53,045.09

Step by Step Solution

1. Step 1: Write the proportion equation
   81,753.72 : 112,749.88 = 53,045.09 : x
2. Step 2: Convert to fraction form
   81,753.72/112,749.88 = 53,045.09/x
3. Step 3: Cross multiply
   81,753.72x = 112,749.88 × 53,045.09
4. Step 4: Simplify right side
   81,753.72x = 5,980,827,992.22
5. Step 5: Solve for x
   x = 5,980,827,992.22/81,753.72
6. Step 6: Final answer
   x = 73,156.64