Finding the Fourth Proportional to 105,078.90, 157,359.15 and 69,827.70

Step by Step Solution

1. Step 1: Write the proportion equation
   105,078.90 : 157,359.15 = 69,827.70 : x
2. Step 2: Convert to fraction form
   105,078.90/157,359.15 = 69,827.70/x
3. Step 3: Cross multiply
   105,078.90x = 157,359.15 × 69,827.70
4. Step 4: Simplify right side
   105,078.90x = 10,988,027,518.46
5. Step 5: Solve for x
   x = 10,988,027,518.46/105,078.90
6. Step 6: Final answer
   x = 104,569.30