Finding the Fourth Proportional to 102,426.42, 141,379.70 and 59,416.78

Step by Step Solution

1. Step 1: Write the proportion equation
   102,426.42 : 141,379.70 = 59,416.78 : x
2. Step 2: Convert to fraction form
   102,426.42/141,379.70 = 59,416.78/x
3. Step 3: Cross multiply
   102,426.42x = 141,379.70 × 59,416.78
4. Step 4: Simplify right side
   102,426.42x = 8,400,326,531.37
5. Step 5: Solve for x
   x = 8,400,326,531.37/102,426.42
6. Step 6: Final answer
   x = 82,013.28