Finding the Fourth Proportional to 99,588.16, 137,429.89 and 54,266.46

Step by Step Solution

1. Step 1: Write the proportion equation
   99,588.16 : 137,429.89 = 54,266.46 : x
2. Step 2: Convert to fraction form
   99,588.16/137,429.89 = 54,266.46/x
3. Step 3: Cross multiply
   99,588.16x = 137,429.89 × 54,266.46
4. Step 4: Simplify right side
   99,588.16x = 7,457,833,628.49
5. Step 5: Solve for x
   x = 7,457,833,628.49/99,588.16
6. Step 6: Final answer
   x = 74,886.75