Finding the Fourth Proportional to 76,482.69, 105,516.63 and 56,387.34

Step by Step Solution

1. Step 1: Write the proportion equation
   76,482.69 : 105,516.63 = 56,387.34 : x
2. Step 2: Convert to fraction form
   76,482.69/105,516.63 = 56,387.34/x
3. Step 3: Cross multiply
   76,482.69x = 105,516.63 × 56,387.34
4. Step 4: Simplify right side
   76,482.69x = 5,949,802,091.46
5. Step 5: Solve for x
   x = 5,949,802,091.46/76,482.69
6. Step 6: Final answer
   x = 77,792.79