Finding the Fourth Proportional to 465,446.72, 698,156.13 and 128,507.94

Step by Step Solution

1. Step 1: Write the proportion equation
   465,446.72 : 698,156.13 = 128,507.94 : x
2. Step 2: Convert to fraction form
   465,446.72/698,156.13 = 128,507.94/x
3. Step 3: Cross multiply
   465,446.72x = 698,156.13 × 128,507.94
4. Step 4: Simplify right side
   465,446.72x = 89,718,606,064.67
5. Step 5: Solve for x
   x = 89,718,606,064.67/465,446.72
6. Step 6: Final answer
   x = 192,758.06