Finding the Fourth Proportional to 128,051,401.92, 192,064,176.18 and 86,817,036.20

Step by Step Solution

1. Step 1: Write the proportion equation
   128,051,401.92 : 192,064,176.18 = 86,817,036.20 : x
2. Step 2: Convert to fraction form
   128,051,401.92/192,064,176.18 = 86,817,036.20/x
3. Step 3: Cross multiply
   128,051,401.92x = 192,064,176.18 × 86,817,036.20
4. Step 4: Simplify right side
   128,051,401.92x = 16,674,442,536,142,238
5. Step 5: Solve for x
   x = 16,674,442,536,142,238/128,051,401.92
6. Step 6: Final answer
   x = 130,216,790.18