Finding the Fourth Proportional to 76,402.56, 105,439.68 and 42,867.84

Step by Step Solution

1. Step 1: Write the proportion equation
   76,402.56 : 105,439.68 = 42,867.84 : x
2. Step 2: Convert to fraction form
   76,402.56/105,439.68 = 42,867.84/x
3. Step 3: Cross multiply
   76,402.56x = 105,439.68 × 42,867.84
4. Step 4: Simplify right side
   76,402.56x = 4,519,971,331.89
5. Step 5: Solve for x
   x = 4,519,971,331.89/76,402.56
6. Step 6: Final answer
   x = 59,159.95