Finding the Fourth Proportional to 99,100.59, 136,758.90 and 56,660.01

Step by Step Solution

1. Step 1: Write the proportion equation
   99,100.59 : 136,758.90 = 56,660.01 : x
2. Step 2: Convert to fraction form
   99,100.59/136,758.90 = 56,660.01/x
3. Step 3: Cross multiply
   99,100.59x = 136,758.90 × 56,660.01
4. Step 4: Simplify right side
   99,100.59x = 7,748,759,957.79
5. Step 5: Solve for x
   x = 7,748,759,957.79/99,100.59
6. Step 6: Final answer
   x = 78,190.86