Finding the Fourth Proportional to 137,100.32, 189,155.40 and 76,662.80

Step by Step Solution

1. Step 1: Write the proportion equation
   137,100.32 : 189,155.40 = 76,662.80 : x
2. Step 2: Convert to fraction form
   137,100.32/189,155.40 = 76,662.80/x
3. Step 3: Cross multiply
   137,100.32x = 189,155.40 × 76,662.80
4. Step 4: Simplify right side
   137,100.32x = 14,501,182,599.12
5. Step 5: Solve for x
   x = 14,501,182,599.12/137,100.32
6. Step 6: Final answer
   x = 105,770.60