Finding the Fourth Proportional to 99,470.49, 149,250.86 and 91,061.43

Step by Step Solution

1. Step 1: Write the proportion equation
   99,470.49 : 149,250.86 = 91,061.43 : x
2. Step 2: Convert to fraction form
   99,470.49/149,250.86 = 91,061.43/x
3. Step 3: Cross multiply
   99,470.49x = 149,250.86 × 91,061.43
4. Step 4: Simplify right side
   99,470.49x = 13,590,996,740.33
5. Step 5: Solve for x
   x = 13,590,996,740.33/99,470.49
6. Step 6: Final answer
   x = 136,633.46