Finding the Fourth Proportional to 171,941.86, 257,878.59 and 86,529.93

Step by Step Solution

1. Step 1: Write the proportion equation
   171,941.86 : 257,878.59 = 86,529.93 : x
2. Step 2: Convert to fraction form
   171,941.86/257,878.59 = 86,529.93/x
3. Step 3: Cross multiply
   171,941.86x = 257,878.59 × 86,529.93
4. Step 4: Simplify right side
   171,941.86x = 22,314,216,341.20
5. Step 5: Solve for x
   x = 22,314,216,341.20/171,941.86
6. Step 6: Final answer
   x = 129,777.68