Finding the Fourth Proportional to 97,870.76, 146,851.56 and 69,971.12

Step by Step Solution

1. Step 1: Write the proportion equation
   97,870.76 : 146,851.56 = 69,971.12 : x
2. Step 2: Convert to fraction form
   97,870.76/146,851.56 = 69,971.12/x
3. Step 3: Cross multiply
   97,870.76x = 146,851.56 × 69,971.12
4. Step 4: Simplify right side
   97,870.76x = 10,275,368,126.95
5. Step 5: Solve for x
   x = 10,275,368,126.95/97,870.76
6. Step 6: Final answer
   x = 104,989.15