Finding the Fourth Proportional to 99,870.20, 149,840.22 and 62,386.31

Step by Step Solution

1. Step 1: Write the proportion equation
   99,870.20 : 149,840.22 = 62,386.31 : x
2. Step 2: Convert to fraction form
   99,870.20/149,840.22 = 62,386.31/x
3. Step 3: Cross multiply
   99,870.20x = 149,840.22 × 62,386.31
4. Step 4: Simplify right side
   99,870.20x = 9,347,978,415.39
5. Step 5: Solve for x
   x = 9,347,978,415.39/99,870.20
6. Step 6: Final answer
   x = 93,601.28