Finding the Fourth Proportional to 72,870.55, 100,586.52 and 42,665.57

Step by Step Solution

1. Step 1: Write the proportion equation
   72,870.55 : 100,586.52 = 42,665.57 : x
2. Step 2: Convert to fraction form
   72,870.55/100,586.52 = 42,665.57/x
3. Step 3: Cross multiply
   72,870.55x = 100,586.52 × 42,665.57
4. Step 4: Simplify right side
   72,870.55x = 4,291,580,493.86
5. Step 5: Solve for x
   x = 4,291,580,493.86/72,870.55
6. Step 6: Final answer
   x = 58,893.21