Finding the Fourth Proportional to 99,972, 137,961.52 and 55,260

Step by Step Solution

1. Step 1: Write the proportion equation
   99,972 : 137,961.52 = 55,260 : x
2. Step 2: Convert to fraction form
   99,972/137,961.52 = 55,260/x
3. Step 3: Cross multiply
   99,972x = 137,961.52 × 55,260
4. Step 4: Simplify right side
   99,972x = 7,623,753,595.20
5. Step 5: Solve for x
   x = 7,623,753,595.20/99,972
6. Step 6: Final answer
   x = 76,258.89