Finding the Fourth Proportional to 72,345.08, 108,550.40 and 42,820.52

Step by Step Solution

1. Step 1: Write the proportion equation
   72,345.08 : 108,550.40 = 42,820.52 : x
2. Step 2: Convert to fraction form
   72,345.08/108,550.40 = 42,820.52/x
3. Step 3: Cross multiply
   72,345.08x = 108,550.40 × 42,820.52
4. Step 4: Simplify right side
   72,345.08x = 4,648,184,574.21
5. Step 5: Solve for x
   x = 4,648,184,574.21/72,345.08
6. Step 6: Final answer
   x = 64,250.18