Finding the Fourth Proportional to 76,669.31, 105,803.62 and 42,677.06

Step by Step Solution

1. Step 1: Write the proportion equation
   76,669.31 : 105,803.62 = 42,677.06 : x
2. Step 2: Convert to fraction form
   76,669.31/105,803.62 = 42,677.06/x
3. Step 3: Cross multiply
   76,669.31x = 105,803.62 × 42,677.06
4. Step 4: Simplify right side
   76,669.31x = 4,515,386,803.25
5. Step 5: Solve for x
   x = 4,515,386,803.25/76,669.31
6. Step 6: Final answer
   x = 58,894.32