Finding the Fourth Proportional to 370,216.72, 555,320.16 and 89,736.40

Step by Step Solution

1. Step 1: Write the proportion equation
   370,216.72 : 555,320.16 = 89,736.40 : x
2. Step 2: Convert to fraction form
   370,216.72/555,320.16 = 89,736.40/x
3. Step 3: Cross multiply
   370,216.72x = 555,320.16 × 89,736.40
4. Step 4: Simplify right side
   370,216.72x = 49,832,432,005.82
5. Step 5: Solve for x
   x = 49,832,432,005.82/370,216.72
6. Step 6: Final answer
   x = 134,603.41