Finding the Fourth Proportional to 139,870.96, 209,989.34 and 83,048.58

Step by Step Solution

1. Step 1: Write the proportion equation
   139,870.96 : 209,989.34 = 83,048.58 : x
2. Step 2: Convert to fraction form
   139,870.96/209,989.34 = 83,048.58/x
3. Step 3: Cross multiply
   139,870.96x = 209,989.34 × 83,048.58
4. Step 4: Simplify right side
   139,870.96x = 17,439,316,502.14
5. Step 5: Solve for x
   x = 17,439,316,502.14/139,870.96
6. Step 6: Final answer
   x = 124,681.47