Finding the Fourth Proportional to 104,992.86, 157,333.71 and 86,404.98

Step by Step Solution

1. Step 1: Write the proportion equation
   104,992.86 : 157,333.71 = 86,404.98 : x
2. Step 2: Convert to fraction form
   104,992.86/157,333.71 = 86,404.98/x
3. Step 3: Cross multiply
   104,992.86x = 157,333.71 × 86,404.98
4. Step 4: Simplify right side
   104,992.86x = 13,594,416,065.88
5. Step 5: Solve for x
   x = 13,594,416,065.88/104,992.86
6. Step 6: Final answer
   x = 129,479.43