Finding the Fourth Proportional to 105,077.92, 157,409.52 and 78,812.32

Step by Step Solution

1. Step 1: Write the proportion equation
   105,077.92 : 157,409.52 = 78,812.32 : x
2. Step 2: Convert to fraction form
   105,077.92/157,409.52 = 78,812.32/x
3. Step 3: Cross multiply
   105,077.92x = 157,409.52 × 78,812.32
4. Step 4: Simplify right side
   105,077.92x = 12,405,809,461.29
5. Step 5: Solve for x
   x = 12,405,809,461.29/105,077.92
6. Step 6: Final answer
   x = 118,062.95