Finding the Fourth Proportional to 99,642.47, 149,550.05 and 52,291.01

Step by Step Solution

1. Step 1: Write the proportion equation
   99,642.47 : 149,550.05 = 52,291.01 : x
2. Step 2: Convert to fraction form
   99,642.47/149,550.05 = 52,291.01/x
3. Step 3: Cross multiply
   99,642.47x = 149,550.05 × 52,291.01
4. Step 4: Simplify right side
   99,642.47x = 7,820,123,272.47
5. Step 5: Solve for x
   x = 7,820,123,272.47/99,642.47
6. Step 6: Final answer
   x = 78,481.83