Finding the Fourth Proportional to 105,074.67, 157,404.65 and 78,809.07

Step by Step Solution

1. Step 1: Write the proportion equation
   105,074.67 : 157,404.65 = 78,809.07 : x
2. Step 2: Convert to fraction form
   105,074.67/157,404.65 = 78,809.07/x
3. Step 3: Cross multiply
   105,074.67x = 157,404.65 × 78,809.07
4. Step 4: Simplify right side
   105,074.67x = 12,404,913,686.13
5. Step 5: Solve for x
   x = 12,404,913,686.13/105,074.67
6. Step 6: Final answer
   x = 118,058.08