Finding the Fourth Proportional to 76,681.78, 105,818.24 and 43,141.30

Step by Step Solution

1. Step 1: Write the proportion equation
   76,681.78 : 105,818.24 = 43,141.30 : x
2. Step 2: Convert to fraction form
   76,681.78/105,818.24 = 43,141.30/x
3. Step 3: Cross multiply
   76,681.78x = 105,818.24 × 43,141.30
4. Step 4: Simplify right side
   76,681.78x = 4,565,136,437.31
5. Step 5: Solve for x
   x = 4,565,136,437.31/76,681.78
6. Step 6: Final answer
   x = 59,533.52