Finding the Fourth Proportional to 152,897.37, 228,996.87 and 72,991.55

Step by Step Solution

1. Step 1: Write the proportion equation
   152,897.37 : 228,996.87 = 72,991.55 : x
2. Step 2: Convert to fraction form
   152,897.37/228,996.87 = 72,991.55/x
3. Step 3: Cross multiply
   152,897.37x = 228,996.87 × 72,991.55
4. Step 4: Simplify right side
   152,897.37x = 16,714,835,341.46
5. Step 5: Solve for x
   x = 16,714,835,341.46/152,897.37
6. Step 6: Final answer
   x = 109,320.62