Finding the Fourth Proportional to 91,543.96, 137,128.83 and 67,878.19

Step by Step Solution

1. Step 1: Write the proportion equation
   91,543.96 : 137,128.83 = 67,878.19 : x
2. Step 2: Convert to fraction form
   91,543.96/137,128.83 = 67,878.19/x
3. Step 3: Cross multiply
   91,543.96x = 137,128.83 × 67,878.19
4. Step 4: Simplify right side
   91,543.96x = 9,308,056,777.22
5. Step 5: Solve for x
   x = 9,308,056,777.22/91,543.96
6. Step 6: Final answer
   x = 101,678.55