Finding the Fourth Proportional to 67,715.48, 101,590.50 and 42,931.64

Step by Step Solution

1. Step 1: Write the proportion equation
   67,715.48 : 101,590.50 = 42,931.64 : x
2. Step 2: Convert to fraction form
   67,715.48/101,590.50 = 42,931.64/x
3. Step 3: Cross multiply
   67,715.48x = 101,590.50 × 42,931.64
4. Step 4: Simplify right side
   67,715.48x = 4,361,446,773.42
5. Step 5: Solve for x
   x = 4,361,446,773.42/67,715.48
6. Step 6: Final answer
   x = 64,408.42