Finding the Fourth Proportional to 118,428.06, 163,428.31 and 64,713.34

Step by Step Solution

1. Step 1: Write the proportion equation
   118,428.06 : 163,428.31 = 64,713.34 : x
2. Step 2: Convert to fraction form
   118,428.06/163,428.31 = 64,713.34/x
3. Step 3: Cross multiply
   118,428.06x = 163,428.31 × 64,713.34
4. Step 4: Simplify right side
   118,428.06x = 10,575,991,790.66
5. Step 5: Solve for x
   x = 10,575,991,790.66/118,428.06
6. Step 6: Final answer
   x = 89,303.09