Finding the Fourth Proportional to 76,795.02, 105,985.78 and 42,806.60

Step by Step Solution

1. Step 1: Write the proportion equation
   76,795.02 : 105,985.78 = 42,806.60 : x
2. Step 2: Convert to fraction form
   76,795.02/105,985.78 = 42,806.60/x
3. Step 3: Cross multiply
   76,795.02x = 105,985.78 × 42,806.60
4. Step 4: Simplify right side
   76,795.02x = 4,536,890,890.15
5. Step 5: Solve for x
   x = 4,536,890,890.15/76,795.02
6. Step 6: Final answer
   x = 59,077.93