Finding the Fourth Proportional to 47,700.31, 65,788.87 and 42,255.21

Step by Step Solution

1. Step 1: Write the proportion equation
   47,700.31 : 65,788.87 = 42,255.21 : x
2. Step 2: Convert to fraction form
   47,700.31/65,788.87 = 42,255.21/x
3. Step 3: Cross multiply
   47,700.31x = 65,788.87 × 42,255.21
4. Step 4: Simplify right side
   47,700.31x = 2,779,922,517.51
5. Step 5: Solve for x
   x = 2,779,922,517.51/47,700.31
6. Step 6: Final answer
   x = 58,278.92