Finding the Fourth Proportional to 118,328.59, 163,300.10 and 64,618.60

Step by Step Solution

1. Step 1: Write the proportion equation
   118,328.59 : 163,300.10 = 64,618.60 : x
2. Step 2: Convert to fraction form
   118,328.59/163,300.10 = 64,618.60/x
3. Step 3: Cross multiply
   118,328.59x = 163,300.10 × 64,618.60
4. Step 4: Simplify right side
   118,328.59x = 10,552,223,518.77
5. Step 5: Solve for x
   x = 10,552,223,518.77/118,328.59
6. Step 6: Final answer
   x = 89,177.29