Finding the Fourth Proportional to 48,726, 72,877.86 and 28,687.76

Step by Step Solution

1. Step 1: Write the proportion equation
   48,726 : 72,877.86 = 28,687.76 : x
2. Step 2: Convert to fraction form
   48,726/72,877.86 = 28,687.76/x
3. Step 3: Cross multiply
   48,726x = 72,877.86 × 28,687.76
4. Step 4: Simplify right side
   48,726x = 2,090,702,192.60
5. Step 5: Solve for x
   x = 2,090,702,192.60/48,726
6. Step 6: Final answer
   x = 42,907.32