Finding the Fourth Proportional to 76,407.62, 105,436.65 and 42,412.98

Step by Step Solution

1. Step 1: Write the proportion equation
   76,407.62 : 105,436.65 = 42,412.98 : x
2. Step 2: Convert to fraction form
   76,407.62/105,436.65 = 42,412.98/x
3. Step 3: Cross multiply
   76,407.62x = 105,436.65 × 42,412.98
4. Step 4: Simplify right side
   76,407.62x = 4,471,882,527.72
5. Step 5: Solve for x
   x = 4,471,882,527.72/76,407.62
6. Step 6: Final answer
   x = 58,526.66