Finding the Fourth Proportional to 65,975.96, 90,961.17 and 42,061.12

Step by Step Solution

1. Step 1: Write the proportion equation
   65,975.96 : 90,961.17 = 42,061.12 : x
2. Step 2: Convert to fraction form
   65,975.96/90,961.17 = 42,061.12/x
3. Step 3: Cross multiply
   65,975.96x = 90,961.17 × 42,061.12
4. Step 4: Simplify right side
   65,975.96x = 3,825,928,686.71
5. Step 5: Solve for x
   x = 3,825,928,686.71/65,975.96
6. Step 6: Final answer
   x = 57,989.74