Finding the Fourth Proportional to 99,300.46, 137,019.36 and 58,999.32

Step by Step Solution

1. Step 1: Write the proportion equation
   99,300.46 : 137,019.36 = 58,999.32 : x
2. Step 2: Convert to fraction form
   99,300.46/137,019.36 = 58,999.32/x
3. Step 3: Cross multiply
   99,300.46x = 137,019.36 × 58,999.32
4. Step 4: Simplify right side
   99,300.46x = 8,084,049,066.84
5. Step 5: Solve for x
   x = 8,084,049,066.84/99,300.46
6. Step 6: Final answer
   x = 81,409.99