Finding the Fourth Proportional to 99,867.42, 149,641.47 and 69,938.10

Step by Step Solution

1. Step 1: Write the proportion equation
   99,867.42 : 149,641.47 = 69,938.10 : x
2. Step 2: Convert to fraction form
   99,867.42/149,641.47 = 69,938.10/x
3. Step 3: Cross multiply
   99,867.42x = 149,641.47 × 69,938.10
4. Step 4: Simplify right side
   99,867.42x = 10,465,640,093.01
5. Step 5: Solve for x
   x = 10,465,640,093.01/99,867.42
6. Step 6: Final answer
   x = 104,795.34