Finding the Fourth Proportional to 76,407.82, 105,440.06 and 42,417.80

Step by Step Solution

1. Step 1: Write the proportion equation
   76,407.82 : 105,440.06 = 42,417.80 : x
2. Step 2: Convert to fraction form
   76,407.82/105,440.06 = 42,417.80/x
3. Step 3: Cross multiply
   76,407.82x = 105,440.06 × 42,417.80
4. Step 4: Simplify right side
   76,407.82x = 4,472,535,377.07
5. Step 5: Solve for x
   x = 4,472,535,377.07/76,407.82
6. Step 6: Final answer
   x = 58,535.05