Finding the Fourth Proportional to 56,723, 78,264.34 and 47,682.72

Step by Step Solution

1. Step 1: Write the proportion equation
   56,723 : 78,264.34 = 47,682.72 : x
2. Step 2: Convert to fraction form
   56,723/78,264.34 = 47,682.72/x
3. Step 3: Cross multiply
   56,723x = 78,264.34 × 47,682.72
4. Step 4: Simplify right side
   56,723x = 3,731,856,610.20
5. Step 5: Solve for x
   x = 3,731,856,610.20/56,723
6. Step 6: Final answer
   x = 65,790.89