Finding the Fourth Proportional to 76,814.60, 105,995.57 and 42,820.52

Step by Step Solution

1. Step 1: Write the proportion equation
   76,814.60 : 105,995.57 = 42,820.52 : x
2. Step 2: Convert to fraction form
   76,814.60/105,995.57 = 42,820.52/x
3. Step 3: Cross multiply
   76,814.60x = 105,995.57 × 42,820.52
4. Step 4: Simplify right side
   76,814.60x = 4,538,784,681.02
5. Step 5: Solve for x
   x = 4,538,784,681.02/76,814.60
6. Step 6: Final answer
   x = 59,087.53