Finding the Fourth Proportional to 76,670.50, 105,805.30 and 43,136.50

Step by Step Solution

1. Step 1: Write the proportion equation
   76,670.50 : 105,805.30 = 43,136.50 : x
2. Step 2: Convert to fraction form
   76,670.50/105,805.30 = 43,136.50/x
3. Step 3: Cross multiply
   76,670.50x = 105,805.30 × 43,136.50
4. Step 4: Simplify right side
   76,670.50x = 4,564,070,323.45
5. Step 5: Solve for x
   x = 4,564,070,323.45/76,670.50
6. Step 6: Final answer
   x = 59,528.38