Finding the Fourth Proportional to 56,881.88, 85,256.38 and 42,796.65

Step by Step Solution

1. Step 1: Write the proportion equation
   56,881.88 : 85,256.38 = 42,796.65 : x
2. Step 2: Convert to fraction form
   56,881.88/85,256.38 = 42,796.65/x
3. Step 3: Cross multiply
   56,881.88x = 85,256.38 × 42,796.65
4. Step 4: Simplify right side
   56,881.88x = 3,648,687,348.14
5. Step 5: Solve for x
   x = 3,648,687,348.14/56,881.88
6. Step 6: Final answer
   x = 64,144.99