Finding the Fourth Proportional to 139,784.84, 209,647.86 and 45,023.51

Step by Step Solution

1. Step 1: Write the proportion equation
   139,784.84 : 209,647.86 = 45,023.51 : x
2. Step 2: Convert to fraction form
   139,784.84/209,647.86 = 45,023.51/x
3. Step 3: Cross multiply
   139,784.84x = 209,647.86 × 45,023.51
4. Step 4: Simplify right side
   139,784.84x = 9,439,081,472.95
5. Step 5: Solve for x
   x = 9,439,081,472.95/139,784.84
6. Step 6: Final answer
   x = 67,525.79