Finding the Fourth Proportional to 312,499.91, 468,777.56 and 87,862.31

Step by Step Solution

1. Step 1: Write the proportion equation
   312,499.91 : 468,777.56 = 87,862.31 : x
2. Step 2: Convert to fraction form
   312,499.91/468,777.56 = 87,862.31/x
3. Step 3: Cross multiply
   312,499.91x = 468,777.56 × 87,862.31
4. Step 4: Simplify right side
   312,499.91x = 41,187,879,297.76
5. Step 5: Solve for x
   x = 41,187,879,297.76/312,499.91
6. Step 6: Final answer
   x = 131,801.25