Finding the Fourth Proportional to 94,131.78, 129,915.45 and 56,409.54

Step by Step Solution

1. Step 1: Write the proportion equation
   94,131.78 : 129,915.45 = 56,409.54 : x
2. Step 2: Convert to fraction form
   94,131.78/129,915.45 = 56,409.54/x
3. Step 3: Cross multiply
   94,131.78x = 129,915.45 × 56,409.54
4. Step 4: Simplify right side
   94,131.78x = 7,328,470,773.39
5. Step 5: Solve for x
   x = 7,328,470,773.39/94,131.78
6. Step 6: Final answer
   x = 77,853.31