Finding the Fourth Proportional to 81,587.56, 112,590.72 and 45,780.90

Step by Step Solution

1. Step 1: Write the proportion equation
   81,587.56 : 112,590.72 = 45,780.90 : x
2. Step 2: Convert to fraction form
   81,587.56/112,590.72 = 45,780.90/x
3. Step 3: Cross multiply
   81,587.56x = 112,590.72 × 45,780.90
4. Step 4: Simplify right side
   81,587.56x = 5,154,504,493.25
5. Step 5: Solve for x
   x = 5,154,504,493.25/81,587.56
6. Step 6: Final answer
   x = 63,177.58