Finding the Fourth Proportional to 118,357.60, 163,337.02 and 64,645.15

Step by Step Solution

1. Step 1: Write the proportion equation
   118,357.60 : 163,337.02 = 64,645.15 : x
2. Step 2: Convert to fraction form
   118,357.60/163,337.02 = 64,645.15/x
3. Step 3: Cross multiply
   118,357.60x = 163,337.02 × 64,645.15
4. Step 4: Simplify right side
   118,357.60x = 10,558,945,495.17
5. Step 5: Solve for x
   x = 10,558,945,495.17/118,357.60
6. Step 6: Final answer
   x = 89,212.23