Finding the Fourth Proportional to 288,103.58, 432,142.61 and 98,580.59

Step by Step Solution

1. Step 1: Write the proportion equation
   288,103.58 : 432,142.61 = 98,580.59 : x
2. Step 2: Convert to fraction form
   288,103.58/432,142.61 = 98,580.59/x
3. Step 3: Cross multiply
   288,103.58x = 432,142.61 × 98,580.59
4. Step 4: Simplify right side
   288,103.58x = 42,600,870,804.32
5. Step 5: Solve for x
   x = 42,600,870,804.32/288,103.58
6. Step 6: Final answer
   x = 147,866.51