Finding the Fourth Proportional to 76,487.96, 105,549.70 and 42,498.60

Step by Step Solution

1. Step 1: Write the proportion equation
   76,487.96 : 105,549.70 = 42,498.60 : x
2. Step 2: Convert to fraction form
   76,487.96/105,549.70 = 42,498.60/x
3. Step 3: Cross multiply
   76,487.96x = 105,549.70 × 42,498.60
4. Step 4: Simplify right side
   76,487.96x = 4,485,714,480.42
5. Step 5: Solve for x
   x = 4,485,714,480.42/76,487.96
6. Step 6: Final answer
   x = 58,646.02