Finding the Fourth Proportional to 99,850, 137,793.12 and 55,138

Step by Step Solution

1. Step 1: Write the proportion equation
   99,850 : 137,793.12 = 55,138 : x
2. Step 2: Convert to fraction form
   99,850/137,793.12 = 55,138/x
3. Step 3: Cross multiply
   99,850x = 137,793.12 × 55,138
4. Step 4: Simplify right side
   99,850x = 7,597,637,050.56
5. Step 5: Solve for x
   x = 7,597,637,050.56/99,850
6. Step 6: Final answer
   x = 76,090.51