Finding the Fourth Proportional to 99,776.32, 137,691.04 and 55,064

Step by Step Solution

1. Step 1: Write the proportion equation
   99,776.32 : 137,691.04 = 55,064 : x
2. Step 2: Convert to fraction form
   99,776.32/137,691.04 = 55,064/x
3. Step 3: Cross multiply
   99,776.32x = 137,691.04 × 55,064
4. Step 4: Simplify right side
   99,776.32x = 7,581,819,426.56
5. Step 5: Solve for x
   x = 7,581,819,426.56/99,776.32
6. Step 6: Final answer
   x = 75,988.16