Finding the Fourth Proportional to 99,471.02, 137,272.56 and 61,216.34

Step by Step Solution

1. Step 1: Write the proportion equation
   99,471.02 : 137,272.56 = 61,216.34 : x
2. Step 2: Convert to fraction form
   99,471.02/137,272.56 = 61,216.34/x
3. Step 3: Cross multiply
   99,471.02x = 137,272.56 × 61,216.34
4. Step 4: Simplify right side
   99,471.02x = 8,403,323,705.63
5. Step 5: Solve for x
   x = 8,403,323,705.63/99,471.02
6. Step 6: Final answer
   x = 84,480.12