Finding the Fourth Proportional to 99,856.72, 137,858.52 and 69,274

Step by Step Solution

1. Step 1: Write the proportion equation
   99,856.72 : 137,858.52 = 69,274 : x
2. Step 2: Convert to fraction form
   99,856.72/137,858.52 = 69,274/x
3. Step 3: Cross multiply
   99,856.72x = 137,858.52 × 69,274
4. Step 4: Simplify right side
   99,856.72x = 9,550,011,114.48
5. Step 5: Solve for x
   x = 9,550,011,114.48/99,856.72
6. Step 6: Final answer
   x = 95,637.14