Finding the Fourth Proportional to 162,321.67, 243,531.57 and 78,057.91

Step by Step Solution

1. Step 1: Write the proportion equation
   162,321.67 : 243,531.57 = 78,057.91 : x
2. Step 2: Convert to fraction form
   162,321.67/243,531.57 = 78,057.91/x
3. Step 3: Cross multiply
   162,321.67x = 243,531.57 × 78,057.91
4. Step 4: Simplify right side
   162,321.67x = 19,009,565,373.22
5. Step 5: Solve for x
   x = 19,009,565,373.22/162,321.67
6. Step 6: Final answer
   x = 117,110.46