Finding the Fourth Proportional to 83,881.79, 115,718.72 and 49,870.99

Step by Step Solution

1. Step 1: Write the proportion equation
   83,881.79 : 115,718.72 = 49,870.99 : x
2. Step 2: Convert to fraction form
   83,881.79/115,718.72 = 49,870.99/x
3. Step 3: Cross multiply
   83,881.79x = 115,718.72 × 49,870.99
4. Step 4: Simplify right side
   83,881.79x = 5,771,007,127.93
5. Step 5: Solve for x
   x = 5,771,007,127.93/83,881.79
6. Step 6: Final answer
   x = 68,799.28