Finding the Fourth Proportional to 76,401.76, 105,434.06 and 42,410.66

Step by Step Solution

1. Step 1: Write the proportion equation
   76,401.76 : 105,434.06 = 42,410.66 : x
2. Step 2: Convert to fraction form
   76,401.76/105,434.06 = 42,410.66/x
3. Step 3: Cross multiply
   76,401.76x = 105,434.06 × 42,410.66
4. Step 4: Simplify right side
   76,401.76x = 4,471,528,071.08
5. Step 5: Solve for x
   x = 4,471,528,071.08/76,401.76
6. Step 6: Final answer
   x = 58,526.51