Finding the Fourth Proportional to 912,061.20, 1,364,155.20 and 770,343.60

Step by Step Solution

1. Step 1: Write the proportion equation
   912,061.20 : 1,364,155.20 = 770,343.60 : x
2. Step 2: Convert to fraction form
   912,061.20/1,364,155.20 = 770,343.60/x
3. Step 3: Cross multiply
   912,061.20x = 1,364,155.20 × 770,343.60
4. Step 4: Simplify right side
   912,061.20x = 1,050,868,227,726.72
5. Step 5: Solve for x
   x = 1,050,868,227,726.72/912,061.20
6. Step 6: Final answer
   x = 1,152,190.48