Finding the Fourth Proportional to 99,870.00, 137,814.99 and 56,859.94

Step by Step Solution

1. Step 1: Write the proportion equation
   99,870.00 : 137,814.99 = 56,859.94 : x
2. Step 2: Convert to fraction form
   99,870.00/137,814.99 = 56,859.94/x
3. Step 3: Cross multiply
   99,870.00x = 137,814.99 × 56,859.94
4. Step 4: Simplify right side
   99,870.00x = 7,836,152,021.54
5. Step 5: Solve for x
   x = 7,836,152,021.54/99,870.00
6. Step 6: Final answer
   x = 78,463.53