Finding the Fourth Proportional to 83,978.16, 115,882.20 and 49,981.16

Step by Step Solution

1. Step 1: Write the proportion equation
   83,978.16 : 115,882.20 = 49,981.16 : x
2. Step 2: Convert to fraction form
   83,978.16/115,882.20 = 49,981.16/x
3. Step 3: Cross multiply
   83,978.16x = 115,882.20 × 49,981.16
4. Step 4: Simplify right side
   83,978.16x = 5,791,926,199.94
5. Step 5: Solve for x
   x = 5,791,926,199.94/83,978.16
6. Step 6: Final answer
   x = 68,969.43