Finding the Fourth Proportional to 137,099.90, 189,196.55 and 76,669.85

Step by Step Solution

1. Step 1: Write the proportion equation
   137,099.90 : 189,196.55 = 76,669.85 : x
2. Step 2: Convert to fraction form
   137,099.90/189,196.55 = 76,669.85/x
3. Step 3: Cross multiply
   137,099.90x = 189,196.55 × 76,669.85
4. Step 4: Simplify right side
   137,099.90x = 14,505,669,779.69
5. Step 5: Solve for x
   x = 14,505,669,779.69/137,099.90
6. Step 6: Final answer
   x = 105,803.65