Finding the Fourth Proportional to 56,877.53, 85,249.88 and 42,792.31

Step by Step Solution

1. Step 1: Write the proportion equation
   56,877.53 : 85,249.88 = 42,792.31 : x
2. Step 2: Convert to fraction form
   56,877.53/85,249.88 = 42,792.31/x
3. Step 3: Cross multiply
   56,877.53x = 85,249.88 × 42,792.31
4. Step 4: Simplify right side
   56,877.53x = 3,648,038,865.34
5. Step 5: Solve for x
   x = 3,648,038,865.34/56,877.53
6. Step 6: Final answer
   x = 64,138.49