Finding the Fourth Proportional to 99,626.16, 137,486.72 and 61,410.96

Step by Step Solution

1. Step 1: Write the proportion equation
   99,626.16 : 137,486.72 = 61,410.96 : x
2. Step 2: Convert to fraction form
   99,626.16/137,486.72 = 61,410.96/x
3. Step 3: Cross multiply
   99,626.16x = 137,486.72 × 61,410.96
4. Step 4: Simplify right side
   99,626.16x = 8,443,191,221.96
5. Step 5: Solve for x
   x = 8,443,191,221.96/99,626.16
6. Step 6: Final answer
   x = 84,748.74