Finding the Fourth Proportional to 124,212.42, 171,389.52 and 78,897.78

Step by Step Solution

1. Step 1: Write the proportion equation
   124,212.42 : 171,389.52 = 78,897.78 : x
2. Step 2: Convert to fraction form
   124,212.42/171,389.52 = 78,897.78/x
3. Step 3: Cross multiply
   124,212.42x = 171,389.52 × 78,897.78
4. Step 4: Simplify right side
   124,212.42x = 13,522,252,643.27
5. Step 5: Solve for x
   x = 13,522,252,643.27/124,212.42
6. Step 6: Final answer
   x = 108,863.93