Finding the Fourth Proportional to 76,377.98, 105,397.88 and 42,386.06

Step by Step Solution

1. Step 1: Write the proportion equation
   76,377.98 : 105,397.88 = 42,386.06 : x
2. Step 2: Convert to fraction form
   76,377.98/105,397.88 = 42,386.06/x
3. Step 3: Cross multiply
   76,377.98x = 105,397.88 × 42,386.06
4. Step 4: Simplify right side
   76,377.98x = 4,467,400,865.55
5. Step 5: Solve for x
   x = 4,467,400,865.55/76,377.98
6. Step 6: Final answer
   x = 58,490.69