Finding the Fourth Proportional to 99,897.83, 137,856.70 and 54,576

Step by Step Solution

1. Step 1: Write the proportion equation
   99,897.83 : 137,856.70 = 54,576 : x
2. Step 2: Convert to fraction form
   99,897.83/137,856.70 = 54,576/x
3. Step 3: Cross multiply
   99,897.83x = 137,856.70 × 54,576
4. Step 4: Simplify right side
   99,897.83x = 7,523,667,259.20
5. Step 5: Solve for x
   x = 7,523,667,259.20/99,897.83
6. Step 6: Final answer
   x = 75,313.62