Finding the Fourth Proportional to 384,789, 577,155.98 and 118,521.72

Step by Step Solution

1. Step 1: Write the proportion equation
   384,789 : 577,155.98 = 118,521.72 : x
2. Step 2: Convert to fraction form
   384,789/577,155.98 = 118,521.72/x
3. Step 3: Cross multiply
   384,789x = 577,155.98 × 118,521.72
4. Step 4: Simplify right side
   384,789x = 68,405,519,457.89
5. Step 5: Solve for x
   x = 68,405,519,457.89/384,789
6. Step 6: Final answer
   x = 177,774.10