Finding the Fourth Proportional to 99,431.82, 149,128.29 and 37,089.90

Step by Step Solution

1. Step 1: Write the proportion equation
   99,431.82 : 149,128.29 = 37,089.90 : x
2. Step 2: Convert to fraction form
   99,431.82/149,128.29 = 37,089.90/x
3. Step 3: Cross multiply
   99,431.82x = 149,128.29 × 37,089.90
4. Step 4: Simplify right side
   99,431.82x = 5,531,153,363.27
5. Step 5: Solve for x
   x = 5,531,153,363.27/99,431.82
6. Step 6: Final answer
   x = 55,627.60