Finding the Fourth Proportional to 81,588.72, 112,603.65 and 45,780.87

Step by Step Solution

1. Step 1: Write the proportion equation
   81,588.72 : 112,603.65 = 45,780.87 : x
2. Step 2: Convert to fraction form
   81,588.72/112,603.65 = 45,780.87/x
3. Step 3: Cross multiply
   81,588.72x = 112,603.65 × 45,780.87
4. Step 4: Simplify right side
   81,588.72x = 5,155,093,062.18
5. Step 5: Solve for x
   x = 5,155,093,062.18/81,588.72
6. Step 6: Final answer
   x = 63,183.89