Finding the Fourth Proportional to 76,427.31, 105,472.98 and 42,435.81

Step by Step Solution

1. Step 1: Write the proportion equation
   76,427.31 : 105,472.98 = 42,435.81 : x
2. Step 2: Convert to fraction form
   76,427.31/105,472.98 = 42,435.81/x
3. Step 3: Cross multiply
   76,427.31x = 105,472.98 × 42,435.81
4. Step 4: Simplify right side
   76,427.31x = 4,475,831,339.41
5. Step 5: Solve for x
   x = 4,475,831,339.41/76,427.31
6. Step 6: Final answer
   x = 58,563.25