Finding the Fourth Proportional to 117,840.18, 162,622.86 and 64,128.66

Step by Step Solution

1. Step 1: Write the proportion equation
   117,840.18 : 162,622.86 = 64,128.66 : x
2. Step 2: Convert to fraction form
   117,840.18/162,622.86 = 64,128.66/x
3. Step 3: Cross multiply
   117,840.18x = 162,622.86 × 64,128.66
4. Step 4: Simplify right side
   117,840.18x = 10,428,786,097.17
5. Step 5: Solve for x
   x = 10,428,786,097.17/117,840.18
6. Step 6: Final answer
   x = 88,499.41