Finding the Fourth Proportional to 99,264.01, 136,995.98 and 58,978.10

Step by Step Solution

1. Step 1: Write the proportion equation
   99,264.01 : 136,995.98 = 58,978.10 : x
2. Step 2: Convert to fraction form
   99,264.01/136,995.98 = 58,978.10/x
3. Step 3: Cross multiply
   99,264.01x = 136,995.98 × 58,978.10
4. Step 4: Simplify right side
   99,264.01x = 8,079,762,608.04
5. Step 5: Solve for x
   x = 8,079,762,608.04/99,264.01
6. Step 6: Final answer
   x = 81,396.70