Finding the Fourth Proportional to 288,056.72, 432,152.28 and 98,518.55

Step by Step Solution

1. Step 1: Write the proportion equation
   288,056.72 : 432,152.28 = 98,518.55 : x
2. Step 2: Convert to fraction form
   288,056.72/432,152.28 = 98,518.55/x
3. Step 3: Cross multiply
   288,056.72x = 432,152.28 × 98,518.55
4. Step 4: Simplify right side
   288,056.72x = 42,575,016,004.79
5. Step 5: Solve for x
   x = 42,575,016,004.79/288,056.72
6. Step 6: Final answer
   x = 147,800.81