Finding the Fourth Proportional to 48,679.10, 72,666.52 and 42,774.20

Step by Step Solution

1. Step 1: Write the proportion equation
   48,679.10 : 72,666.52 = 42,774.20 : x
2. Step 2: Convert to fraction form
   48,679.10/72,666.52 = 42,774.20/x
3. Step 3: Cross multiply
   48,679.10x = 72,666.52 × 42,774.20
4. Step 4: Simplify right side
   48,679.10x = 3,108,252,259.78
5. Step 5: Solve for x
   x = 3,108,252,259.78/48,679.10
6. Step 6: Final answer
   x = 63,851.88