Finding the Fourth Proportional to 76,810.72, 106,004.96 and 42,830.28

Step by Step Solution

1. Step 1: Write the proportion equation
   76,810.72 : 106,004.96 = 42,830.28 : x
2. Step 2: Convert to fraction form
   76,810.72/106,004.96 = 42,830.28/x
3. Step 3: Cross multiply
   76,810.72x = 106,004.96 × 42,830.28
4. Step 4: Simplify right side
   76,810.72x = 4,540,222,118.19
5. Step 5: Solve for x
   x = 4,540,222,118.19/76,810.72
6. Step 6: Final answer
   x = 59,109.22