Finding the Fourth Proportional to 918,086.10, 1,377,129.15 and 771,119.70

Step by Step Solution

1. Step 1: Write the proportion equation
   918,086.10 : 1,377,129.15 = 771,119.70 : x
2. Step 2: Convert to fraction form
   918,086.10/1,377,129.15 = 771,119.70/x
3. Step 3: Cross multiply
   918,086.10x = 1,377,129.15 × 771,119.70
4. Step 4: Simplify right side
   918,086.10x = 1,061,931,417,009.25
5. Step 5: Solve for x
   x = 1,061,931,417,009.25/918,086.10
6. Step 6: Final answer
   x = 1,156,679.55