Finding the Fourth Proportional to 76,656.42, 105,779.61 and 42,662.34

Step by Step Solution

1. Step 1: Write the proportion equation
   76,656.42 : 105,779.61 = 42,662.34 : x
2. Step 2: Convert to fraction form
   76,656.42/105,779.61 = 42,662.34/x
3. Step 3: Cross multiply
   76,656.42x = 105,779.61 × 42,662.34
4. Step 4: Simplify right side
   76,656.42x = 4,512,805,686.89
5. Step 5: Solve for x
   x = 4,512,805,686.89/76,656.42
6. Step 6: Final answer
   x = 58,870.55