Finding the Fourth Proportional to 153,196.07, 229,793.76 and 72,990.58

Step by Step Solution

1. Step 1: Write the proportion equation
   153,196.07 : 229,793.76 = 72,990.58 : x
2. Step 2: Convert to fraction form
   153,196.07/229,793.76 = 72,990.58/x
3. Step 3: Cross multiply
   153,196.07x = 229,793.76 × 72,990.58
4. Step 4: Simplify right side
   153,196.07x = 16,772,778,308.86
5. Step 5: Solve for x
   x = 16,772,778,308.86/153,196.07
6. Step 6: Final answer
   x = 109,485.70