Finding the Fourth Proportional to 85,682,382.66, 128,527,707.42 and 28,173,380.58

Step by Step Solution

1. Step 1: Write the proportion equation
   85,682,382.66 : 128,527,707.42 = 28,173,380.58 : x
2. Step 2: Convert to fraction form
   85,682,382.66/128,527,707.42 = 28,173,380.58/x
3. Step 3: Cross multiply
   85,682,382.66x = 128,527,707.42 × 28,173,380.58
4. Step 4: Simplify right side
   85,682,382.66x = 3,621,060,016,218,549.50
5. Step 5: Solve for x
   x = 3,621,060,016,218,549.50/85,682,382.66
6. Step 6: Final answer
   x = 42,261,429.99