Finding the Fourth Proportional to 118,510.72, 163,545.08 and 64,799.20

Step by Step Solution

1. Step 1: Write the proportion equation
   118,510.72 : 163,545.08 = 64,799.20 : x
2. Step 2: Convert to fraction form
   118,510.72/163,545.08 = 64,799.20/x
3. Step 3: Cross multiply
   118,510.72x = 163,545.08 × 64,799.20
4. Step 4: Simplify right side
   118,510.72x = 10,597,590,347.94
5. Step 5: Solve for x
   x = 10,597,590,347.94/118,510.72
6. Step 6: Final answer
   x = 89,423.05