Finding the Fourth Proportional to 72,054.20, 99,342.35 and 59,085.72

Step by Step Solution

1. Step 1: Write the proportion equation
   72,054.20 : 99,342.35 = 59,085.72 : x
2. Step 2: Convert to fraction form
   72,054.20/99,342.35 = 59,085.72/x
3. Step 3: Cross multiply
   72,054.20x = 99,342.35 × 59,085.72
4. Step 4: Simplify right side
   72,054.20x = 5,869,714,276.24
5. Step 5: Solve for x
   x = 5,869,714,276.24/72,054.20
6. Step 6: Final answer
   x = 81,462.49