Finding the Fourth Proportional to 48,647.79, 72,878.54 and 42,961.59

Step by Step Solution

1. Step 1: Write the proportion equation
   48,647.79 : 72,878.54 = 42,961.59 : x
2. Step 2: Convert to fraction form
   48,647.79/72,878.54 = 42,961.59/x
3. Step 3: Cross multiply
   48,647.79x = 72,878.54 × 42,961.59
4. Step 4: Simplify right side
   48,647.79x = 3,130,977,740.47
5. Step 5: Solve for x
   x = 3,130,977,740.47/48,647.79
6. Step 6: Final answer
   x = 64,360.12