Finding the Fourth Proportional to 77,128.47, 106,436.99 and 43,136.82

Step by Step Solution

1. Step 1: Write the proportion equation
   77,128.47 : 106,436.99 = 43,136.82 : x
2. Step 2: Convert to fraction form
   77,128.47/106,436.99 = 43,136.82/x
3. Step 3: Cross multiply
   77,128.47x = 106,436.99 × 43,136.82
4. Step 4: Simplify right side
   77,128.47x = 4,591,353,144.17
5. Step 5: Solve for x
   x = 4,591,353,144.17/77,128.47
6. Step 6: Final answer
   x = 59,528.64